IPTV ( INTERNET PROTOCOL TELEVISION)

Internet Protocol television (IPTV) is a system through which television services are delivered using the Internet protocol suite over a packet-switched network such as the Internet, instead of being delivered through traditional terrestrial, satellite signal, and cable television formats.

IPTV services may be classified into three main groups:

• live television, with or without interactivity related to the current TV show;
• time-shifted television: catch-up TV (replays a TV show that was broadcast hours or days ago), start-over TV (replays the current TV show from its beginning);
• video on demand (VOD): browse a catalog of videos, not related to TV programming.
IPTV is distinguished from Internet television by its on-going standardization process (e.g., European Telecommunications Standards Institute) and preferential deployment scenarios in subscriber-based telecommunications networks with high-speed access channels into end-user premises via set-top boxes or other customer-premises equipment.

Definition

Historically, many different definitions of IPTV have appeared, including elementary streams over IP networks, transport streams over IP networks and a number of proprietary systems.
One official definition approved by the International Telecommunication Union focus group on IPTV (ITU-T FG IPTV) is:

"IPTV is defined as multimedia services such as television/video/audio/text/graphics/data delivered over IP based networks managed to provide the required level of quality of service and experience, security, interactivity and reliability."

Another more detailed definition of IPTV is the one given by Alliance for Telecommunications Industry Solutions (ATIS) IPTV Exploratory Group on 2005:

"IPTV is defined as the secure and reliable delivery to subscribers of entertainment video and related services. These services may include, for example, Live TV, Video On Demand (VOD) and Interactive TV (iTV). These services are delivered across an access agnostic, packet switched network that employs the IP protocol to transport the audio, video and control signals. In contrast to video over the public Internet, with IPTV deployments, network security and performance are tightly managed to ensure a superior entertainment experience, resulting in a compelling business environment for content providers, advertisers and customers alike."




In 1994, ABC's World News Now was the first television program to be broadcast over the Internet, using the CU-SeeMe videoconferencing software.
The term IPTV first appeared in 1995 with the founding of Precept Software by Judith Estrin and Bill Carrico. 

Elements

• TV head-end: where live TV channels are encoded, encrypted and delivered in the form of IP multicast streams.
• VOD platform: where on-demand video assets are stored and served when a user makes a request in the form of IP unicast stream.
• Interactive portal: allows the user to navigate within the different IPTV services, such as the VOD catalog.
• Delivery network: the packet switched network that carries IP packets (unicast and multicast).
• Home gateway: the piece of equipment at the user's home that terminates the access link from the delivery network.
• User's set-top box: the piece of equipment at the user's home that decodes and decrypt TV and VOD content and displays it on the TV screen.

Advantages

The Internet protocol-based platform offers significant advantages, including the ability to integrate television with other IP-based services like high speed Internet access and VoIP.

A switched IP network also allows for the delivery of significantly more content and functionality. In a typical TV or satellite network, using broadcast video technology, all the content constantly flows downstream to each customer, and the customer switches the content at the set-top box. The customer can select from as many choices as the telecomms, cable or satellite company can stuff into the “pipe” flowing into the home. A switched IP network works differently. Content remains in the network, and only the content the customer selects is sent into the customer’s home. That frees up bandwidth, and the customer’s choice is less restricted by the size of the “pipe” into the HOME This also implies that the customer's privacy could be compromised to a greater extent than is possible with traditional TV or satellite networks. It may also provide a means to hack into, or at least disrupt (see Denial of service) the private network.

Interactivity

An IP-based platform also allows significant opportunities to make the TV viewing experience more interactive and personalized. The supplier may, for example, include an interactive program guide that allows viewers to search for content by title or actor’s name, or a picture-in-picture functionality that allows them to “channel surf” without leaving the program they’re watching. Viewers may be able to look up a player’s stats while watching a sports game, or control the camera angle. They also may be able to access photos or music from their PC on their television, use a wireless phone to schedule a recording of their favorite show, or even adjust parental controls so their child can watch a documentary for a school report, while they’re away from home.

In order that there can take place an interaction between the receiver and the transmitter, a feedback channel is needed. Due to this, terrestrial, satellite, and cable networks for television do not allow interactivity. However, interactivity with those networks can be possible by combining TV networks with data networks such as the Internet or a mobile communication network.

Video-on-demand

IPTV technology is bringing video-on-demand (VoD) to television, which permits a customer to browse an online program or film catalog, to watch trailers and to then select a selected recording. The playout of the selected item starts nearly instantaneously on the customer's TV or PC.

Technically, when the customer selects the movie, a point-to-point unicast connection is set up between the customer's decoder (set-top box or PC) and the delivering streaming server. The signalling for the trick play functionality (pause, slow-motion, wind/rewind etc.) is assured by RTSP (Real Time Streaming Protocol).




 The most common codecs used for VoD are MPEG-2, MPEG-4 and VC-1.

In an attempt to avoid content piracy, the VoD content is usually encrypted. Whilst encryption of satellite and cable TV broadcasts is an old practice, with IPTV technology it can effectively be thought of as a form of Digital rights management. A film that is chosen, for example, may be playable for 24 hours following payment, after which time it becomes unavailable.

IPTV-based converged services

Another advantage of an IP-based network is the opportunity for integration and convergence. This opportunity is amplified when using IMS-based solutions. Converged services implies interaction of existing services in a seamless manner to create new value added services. One example is on-screen Caller ID, getting Caller ID on a TV and the ability to handle it (send it to voice mail, etc.). IP-based services will help to enable efforts to provide consumers anytime-anywhere access to content over their televisions, PCs and cell phones, and to integrate services and content to tie them together. Within businesses and institutions, IPTV eliminates the need to run a parallel infrastructure to deliver live and stored video services.

Limitations

IPTVIPTV is sensitive to packet loss and delays if the streamed data is unreliable. IPTV has strict minimum speed requirements in order to facilitate the right number of frames per second to deliver moving pictures. This means that the limited connection speed and bandwidth available for a large IPTV customer base can reduce the service quality delivered.

Although a few countries have very high-speed broadband-enabled populations, such as South Korea with 6 million homes benefiting from a minimum connection speed of 100 Mbit/s, in other countries (such as the UK) legacy networks struggle to provide 3–5 Mbit/s and so simultaneous provision to the home of TV channels, VOIP and Internet access may not be viable. The last-mile delivery for IPTV usually has a bandwidth restriction that only allows a small number of simultaneous TV channel streams – typically from one to three – to be delivered.

Streaming IPTV across wireless links within the home has proved troublesome; not due to bandwidth limitations as many assume, but due to issues with multipath and reflections of the RF signal carrying the IP data packets. An IPTV stream is sensitive to packets arriving at the right time and in the right order. Improvements in wireless technology are now starting to provide equipment to solve the problem.

Due to the limitations of wireless, most IPTV service providers today use wired home networking technologies instead of wireless technologies like 802.11. Service providers such as AT&T (which makes extensive use of wireline home networking as part of its U-Verse IPTV service) have expressed support for the work done in this direction by ITU-T, which has adopted Recommendation G.hn (also known as G.9960), which is a next-generation home networking standard that specifies a common PHY/MAC that can operate over any home wiring (power lines, phone lines or coaxial cables).

Latency

The latency inherent in the use of satellite Internet is often held up as reason why satellites cannot be successfully used for IPTV, but in practice latency is not an important factor for IPTV. An IPTV service does not require real-time transmission, as is the case with telephony or videoconferencing services.

KNOW YOUR CUSTOMER NORMS AND BANKS (KYC)

Money laundering by banks and insurance companies is more widespread than earlier thought, another expose by an online news website has revealed. This development is bound to force banks to undertake a fresh round of verification of the identity of almost all account holders, an exercise called ‘Know your Customer’. 

WHAT IS KYC?

Banks undertake this exercise to verify the identity of their customers. The KYC exercise aims to prevent banks from being used, intentionally or unintentionally by criminal elements, for money laundering.

DOES KYC APPLY TO ALL CUSTOMERS?

Yes. KYC is applicable to every individual who wants to have any business relationship with the bank. This means, any individual wanting to open an account (savings or current account and recurring or fixed deposit), get a draft, open a locker, receive any benefits on account of financial transactions, remittance or wire transfer, and apply for a loan.

DOES IT HAVE ANY LEGAL BACKING?

Yes. The KYC norm has been validated under Section 35A of the Banking Regulation Act, 1949, and Rule 7 of the Prevention of Money-Laundering Rules, 2005. Any violation of these norms could attract severe penalty under the BR Act.

WHAT IS NEEDED FOR A KYC CHECK?

KYC has two components: identity and address. While PAN and voter card, driving licence and any other identity document that satisfies the banks requirements serve as proof of identity, a copy of passport, electricity or phone bill or bank account statement are accepted as proof of address.

DO BANKS OPEN ACCOUNTS FOR THOSE WITHOUT AN ADDRESS PROOF?

Yes. But such individuals have to submit an identity document along with a utility bill of the relative with whom the prospective customer is living and a declaration from the relative that the said person is a relative.

CAN KYC NORMS BE RELAXED?

To ensure financial inclusion, a low-income group customer without identity and address proofs can open a bank account with an introduction from another account holder who has fulfilled the bank’s KYC procedure. However, the balance in all his accounts taken together is not expected to exceed 50,000 and the total credit in all the accounts taken together is not expected to exceed 1 lakh. The introducer’s account with the bank should be at least six months old and should show satisfactory transactions.

IS KYC COMPLIANCE A ONE-TIME EXERCISE?

No. Banks can ask customers to re-submit fresh identification and address proof to update their records. They can also ask for additional documents if they have doubts about some transaction in order to prevent the account from being used for money laundering, terrorist or criminal activities.

HAVE BANKS BEEN PENALISED  FOR KYC NORM VIOLATIONS?

Yes. The RBI has penalised HDFC Bank,  ICICI Bank, Citibank andStandard Chartered Bank.

FOOD SAFETY AND STANDARDS BILL 2005( Fully Explained, 360 degrees analysis)

HIGHLIGHTS OF THE BILL
(Read this section in detail)

• The Food Safety and Standards Bill, 2005 consolidates eight laws governing the food sector and establishes the Food Safety and Standards Authority (FSSA) to regulate the sector.
• FSSA will be aided by several scientific panels and a central advisory committee to lay down standards for food safety. These standards will include specifications for ingredients, contaminants, pesticide residue, biological hazards and labels.
• The law will be enforced through State Commissioners of Food Safety and local level officials.
• Everyone in the food sector is required to get a licence or a registration which would be issued by local authorities.
• Every distributor is required to be able to identify any food article to its manufacturer, and every seller to its distributor. Anyone in the sector should be able to initiate recall procedures if he finds that the food sold had violated specified standards.
KEY ISSUES AND ANALYSIS
(Read this section in detail)

• The organised as well as the unorganised food sectors are required to follow the same food law. The unorganised sector, such as street vendors, might have difficulty in adhering to the law, for example, with regard to specifications on ingredients, traceability and recall procedures.
• The Bill does not require any specific standards for potable water (which is usually provided by local authorities). It is the responsibility of the person preparing or manufacturing food to ensure that he uses water of adequate quality even when tap water does not meet the required safety standards.
• The Bill excludes plants prior to harvesting and animal feed from its purview. Thus, it does not control the entry of pesticides and antibiotics into the food at its source.
• The power to suspend the license of any food operator is given to a local level officer. This offers scope for harassment The food sector in India is governed by a multiplicity of laws under different ministries. A number of committees [2], including the Standing Committee of Parliament on Agriculture in its 12th Report submitted in April 2005 [3], have emphasized the need for a single regulatory body and an integrated food law.
  The Food Safety and Standards Bill, 2005, aims to integrate the food safety laws in the country in order to systematically and scientifically develop the food processing industry and shift from a regulatory regime to self-compliance. As part of the process of consolidation, the Bill proposes to repeal eight existing laws related to food safety*.
  Key features
  • Regulatory authority
    The Bill proposes to establish the Food Safety and Standards Authority of India (FSSA), which would lay down scientific standards of food safety and ensure safe and wholesome food. The FSSA would be assisted by a Central Advisory Committee, a Scientific Committee and a number of Scientific Panels in specifying standards. The standards would be enforced by the Commissioner of Food Safety of each state through Designated Officers and Food Safety Officers.
    Table: Composition of FSSA
    The FSSA would consist of a Chairperson and 18 members.
  
  
• The Chairperson would be either an eminent food scientist or a civil servant not below the rank of Secretary. Seven of the members would be ex-officio, not below the post of Joint Secretary, from various ministries. Five members would be appointed by rotation every three years from the states and Union Territories. The Authority would have two representatives each from the food industry and consumer organizations, one food technologist, and one member from a farmers organisations
• Standards for Food Articles
  The Bill prohibits the use of food additives, processing aid, contaminants, heavy metals, insecticides, pesticides, veterinary drugs residue, antibiotic residues, or solvent residues unless they are in accordance with specified regulations. Certain food items such as irradiated food, genetically modified food, organic food, health supplements and proprietary food cannot be manufactured, processed or sold without adhering to specific regulations.
  The Bill makes it mandatory for the distributor of a food article to identify the manufacturer and the seller to identify either the manufacturer or the distributor of a food item. Every packaged food product has to be labelled as per regulations in the Bill. The packaging and labelling of a food product should not mislead consumers about its quality, quantity or usefulness.
• Food Recall Procedures
  The Bill has special provisions for food recall procedures. If a food business operator (i.e., anyone owning or carrying out a business relating to food) considers that a food item is not in compliance with the specified standards, he has to initiate procedures to withdraw the food in question and inform the competent authorities.
• In order to judge cases related to breach of specified regulations, the state government has the power to appoint an Adjudicating Officer, not below the rank of Additional District Magistrate. Any person not satisfied by the decision of an Adjudicating Officer has the right to appeal to the Food Safety Appellate Tribunal (or to the State Commissioner until the Tribunal is constituted). The Tribunal enjoys the same powers as a civil court and decides the penalty in case of non-compliance with the provisions of the Act.
• Finances
  The Financial Memorandum of the Bill estimates that an expenditure of Rs 10 crore is required to establish the FSSA. The amount includes non-recurring capital expenditure of Rs 3 crore and further recurring expenditure of Rs 7 crore per annum towards salaries, allowances, rent for office accommodation etc.
PART B: KEY ISSUES AND ANALYSIS
• Objectives of the Bill
  The main objectives of the Bill are: (a) to introduce a single statute relating to food, and (b) to provide for scientific development of the food processing industry. The Bill aims to establish a single reference point for all matters relating to food safety and standards, by moving from multi-level, multi-departmental control to a single line of command. It incorporates the salient provisions of the Prevention of Food Adulteration Act 1954 and is based on international legislations, instrumentalities and Codex Alimentarius Commission [4] (Codex).
• Scope
  • Organised vs. Unorganised Sector
    
    
• Enforcement
  Every food business operator is required to have a licence in order to operate his food business. Petty manufacturers whohe Bill empowers the FSSA and State Food Safety Authorities* to monitor and regulate the food business operators. The Commissioner of Food Safety of each state appoints a Designated Officer (DO), not below the level of Sub-Divisional Officer, for a specific district whose duties include issuing or cancelling licences, prohibiting sale of food articles that violate specified standards, receiving report and samples of food articles from Food Safety Officers and getting them analysed. The DO also has the power to serve an 'improvement notice' on any food operator and suspend his license in case of failure in compliance with such a notice. The DO also investigates any complaint made in writing against Food Safety Officers. Food Safety Officers are appointed for a specified local area and their duties include taking samples of food articles, seizing food articles that are of suspect quality or inspecting any place where food articles are stored or manufactured.
  The State Commissioner, on the recommendation of the Designated Officer, decides whether a case of violation would be referred to a court of ordinary jurisdiction or to a Special Court. Cases relating to grievous injury or death for which a prison term of more than three years is prescribed are tried in Special Courts.
  The Bill provides for a graded penalty structure where the punishment depends on the severity of the violation. Offences such as manufacturing, selling, storing or importing sub-standard or misbranded food could incur a fine. Offences such as manufacturing, distributing, selling or importing unsafe food, which result in injury could incur a prison sentence. The sentence could extend to life imprisonment in case the violation causes death. Petty manufacturers who make their own food, hawkers, vendors or temporary stall holders could be fined up to Rs 1 lakh if they violate the specified standards.
  In order tomake their own food, hawkers, vendors or temporary stall holders do not require a licence. Instead, they need to get their businesses registered with the local municipality or Panchayat.he Bill empowers the FSSA and State Food Safety Authorities* to monitor and regulate the food business operators. The Commissioner of Food Safety of each state appoints a Designated Officer (DO), not below the level of Sub-Divisional Officer, for a specific district whose duties include issuing or cancelling licences, prohibiting sale of food articles that violate specified standards, receiving report and samples of food articles from Food Safety Officers and getting them analysed. The DO also has the power to serve an 'improvement notice' on any food operator and suspend his license in case of failure in compliance with such a notice. The DO also investigates any complaint made in writing against Food Safety Officers. Food Safety Officers are appointed for a specified local area and their duties include taking samples of food articles, seizing food articles that are of suspect quality or inspecting any place where food articles are stored or manufactured.
  The State Commissioner, on the recommendation of the Designated Officer, decides whether a case of violation would be referred to a court of ordinary jurisdiction or to a Special Court. Cases relating to grievous injury or death for which a prison term of more than three years is prescribed are tried in Special Courts.
  The Bill provides for a graded penalty structure where the punishment depends on the severity of the violation. Offences such as manufacturing, selling, storing or importing sub-standard or misbranded food could incur a fine. Offences such as manufacturing, distributing, selling or importing unsafe food, which result in injury could incur a prison sentence. The sentence could extend to life imprisonment in case the violation causes death. Petty manufacturers who make their own food, hawkers, vendors or temporary stall h
  olders could be fined up to Rs 1 lakh if they violate the specified standards.
  
  
  Scope
  • Organised vs. Unorganised Sector
    There could be a case for a separate regulation for the unorganised sector. Given that the unorganised sector includes a large number [5] of street food vendors, hawkers, temporary stall holders etc., application of the same law as for the large scale industries may be unrealistic, especially in the short term. Also, requirement of registration and powers given to local level officials to penalise infringement of required standards may lead to corruption. Some of the issues faced by vendors are addressed in the National Policy on Urban Street Vendors, 2004 formulated by the Ministry of Urban Development and Poverty Alleviation. [6]
    Food hawkers in India are generally unaware of food regulations and have no training in food-related matters. They also lack supportive services such as water supply of adequate quality and rubbish disposal systems, which hamper their ability to provide safe food. [7] If such facilities were provided to food vendors, as has been done in countries such as Malaysia and Singapore [8], India might be more successful in ensuring that this sector is able to maintain acceptable standards of hygiene and cleanliness.
    The Bill makes provision for graded penalties where offences like manufacturing, storing or selling misbranded or sub-standard food is punished with a fine and more serious offences with imprisonment. For instance, the penalty for manufacturing or selling sub-standard food extends to Rs 5 lakh, while for misbranded food, it extends to Rs 3 lakh. The Bill also makes provision for compensation in case of injury or death of the consumer. The street food vendors and hawkers c
  • • The fines might prove to be debilitating for the unorganised sector and small scale enterprises, whereas such penalties might not be an effective deterrent for large companies.
    • Potable water
      Though standards are specified for water used as an input in manufacture/preparation of food, the Bill does not require any specific standards for potable water (which is usually provided by local authorities). Thus, it is the responsibility of the manufacturer to ensure that clean and adequate quality water is used even when tap water does not meet the required safety standards. This could be a tall order given the scale of operation of small food enterprises and street food vendors. Cost of preparing food could also rise if each vendor or manufacturer has to invest in water purification systems.
  • Definitions
    Some terms in the Bill have not been defined. This could create confusion and require interpretation by the courts in case of dispute.
    The Preamble as well as Clause 16 (1) refer to 'safe and wholesome food' for human consumption. However, 'wholesome' or 'safe' have not been defined in the Bill.
    The Bill also mentions certain terms like 'Food Safety Management System' whose definition 
    calls for adoption of 'Good Manufacturing Practices', 'Good Hygienic Practices' and 'Hazard Analysis and Critical Control Point'. However, it is not clear from the Bill what these terms imply and whether the Codex definition of such terms is to be followed.
• In the Bill, 'Contaminant' is defined as 'any substance, whether or not added to food, but which is present in such food as a result of production, manufacture, processing, preparation'. The Codex guideline, on the other hand, defines contaminant as 'Any substance not intentionally added to food, which is present in such food as a result of the production' (emphasis added). The omission of the phrase 'not intentionally' from the definition in the Bill could result in cases where yeast added to bread might be called a contaminant.
• Implementation and enforcement
  • Managing Pesticide Residue
    The Bill excludes plants prior to harvesting and animal feed from its purview. Any harmful input (such as pesticides in vegetables or antibiotics in animal feed) that could affect the safety standards of food products are not effectively covered. Therefore, the onus for ensuring that pesticide residue is within acceptable levels lies with every manufacturer/vendor.
  • Traceability
    As per Codex guidelines, traceability covers the whole chain from the farm to the consumer. However, in India, many items such as grain and vegetables are sold at mandi (wholesale) markets. If a food product contains grain or vegetables with pesticides above the permitted level, it would not be possible to trace back the contaminant beyond the mandi. This makes it difficult to take any corrective action.
  • Testing Facilities
    The Bill states that samples of food articles would be sent for testing to various accredited laboratories. It also stipulates how many samples should be taken. However, shortage of testing laboratories and equipment [9] might hamper the implementation of the Bill. [See the section on Finances below].
  • Promote or Penalise
    The Bill aims to provide for a 'systematic and scientific development of the Food Processing Industry'. However, the thrust appears to be on penalising offenders of food safety standards rather than providing support to improve their systems. Given the limited capital of many small scale food processors, there is a possibility that noncompliance could be due to lack of technical standards. Thus, there may be a case to provide support for improving systems within a reasonable timeframe, failing which penal action may be initiated.
  • Penalty Provisions
    The DO has the power to issue an 'improvement notice' to any food operator, and suspend his license in case of non-compliance. Such power at the local level offers scope for harassment and corruption.
  • Consumer Safeguards
    The Bill provides a safeguard for consumers with a provision for Food Recall Procedure. It states that if a food business operator considers that a food item which it has 
  
  
  • processed, manufactured or distributed is not in compliance with the Act, it shall immediately initiate procedures to withdraw the food in question and inform the competent authority. The Bill however does not require the food business operator to inform consumers about a product recall, especially if some of the products have already been sold.
  • Safeguards for Food Businesses
    The Food Safety Officer, while taking food samples for analysis, has to give one part of the sample to the food business operator to make available to the authorities. Providing the food business operator with the right to get the sample tested independently from an accredited laboratory could reduce opportunities for harassment and corruption.
    Any customer can get an article of food examined by a Food Analyst. If this sample is found to be in violation of specified standards, penal action can be initiated. This power in the hands of the customer can be misused.
  • Labelling
    The B
  • • enough to be specified in the Bill such as labels identifying Genetically Modified food and labels detailing nutrition content in packaged food.
  • Composition of the FSSA
    There are two issues relating to the composition of the FSSA. The first issue relates to the representation of the Authority. One could argue that there should be a wider representation from various industry sectors (such as fruit and vegetables; meat and poultry products; milk and milk products; marine products; pickles and jams) as well as from restaurants and street vendors. A counterpoint is that a regulatory body should not have direct representatives from the businesses that it regulates in order to reduce possibility of conflict of interest, and there should be only independent experts and civil servants in the Authority (similar to regulatory bodies such as Securities and Exchange Board of India, Telecom Regulatory Authority of India, and Insurance Regulatory and Development Authority). Similar arguments can be made with respect to the composition of the Central Advisory Committee, which comprises two representatives each from the food industry, consumers, agriculture, and relevant research bodies in addition to all 35 state Food Commissioners.
    The second issue is whether all members should be whole time members, given the substantive nature of the responsibilities. This applies, in particular, to the central government representatives who are ex-officio members with additional responsibilities.
  • Finances
  
  
  
  
  • The Financial Memorandum of the Bill estimates non-recurring capital expenditure of Rs 3 crore and further recurring expenditure of Rs 7 crore per annum towards salaries, allowances, rent for office accommodation etc. The Bill mentions that the FSSA would charge a fee from licensed food operators and accredited food laboratories. However, the question remains whether the funds would be sufficient to maintain the infrastructure required to implement the provisions of this Bill, which include setting up laboratories, training food safety officers and running awareness/training programmes for food business operators and consumers.
    The Financial Memorandum does not specify whether the cost of implementing and enforcing the provisions of the Bill would be different from the existing system under the Prevention of Food Adulteration Act of 1954 (PFA Act). A comparison of the cost of enforcement under PFA Act and the new system proposed by this Bill would be useful in estimating the net cost implications of this Bill.
    It appears that the cost of enforcement would be borne by state/Union Territories governments. It would be useful to estimate the cost that would be incurred by state governments for setting up the required system. 
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EXCHANGE RATES

What do ‘real’ numbers mean?

The word ‘real’ in economics — as opposed to ‘nominal’ — is used to describe a metric, where the impact of prices has been taken into account. For example, real GDP captures output of goods and services at constant prices, removing the effect of inflation.

What is real exchange rate?

Real exchange rate can be defined as the rate that takes into account inflation differential between the countries. Suppose the rupee was trading at Rs 40 to a dollar at the beginning of 2009. Assuming a 10% inflation in the Indian economy and 5% inflation in the US economy for the whole year, then this model says the rupee should depreciate by 5% (10%-5%) to Rs 42 to a dollar, other things being equal.

Why is the real exchange rate important?

Competitiveness of a country’s exports is decided not only by the nominal exchange rate, but also relative price movements in domestic and foreign markets. For instance, even if the nominal exchange of the rupee remains unchanged with respect to, say, the dollar, India’s exports to the US will become less competitive if inflation in India is higher than in the US. This means nominal exchange rate will have to be adjusted for effect of inflation.

How is nominal exchange rate adjusted for inflation?

Central banks use the concept of ‘real effective exchange rate’, or REER, to adjust nominal effective exchange rate for inflation. Conceptually, the REER is the weighted average of nominal exchange rates adjusted for the price differential between the domestic and foreign countries. The price differential, however, is based on the purchasing power concept. The currencies used are of those countries with which trade is the highest.

How does the RBI calculate REER?

The RBI calculates REER for India. It calculates the value of the rupee with respect to two indices, one comprising six countries and the other 36 countries with a 2004-05 base. The RBI, however, uses the wholesale price index-based inflation whereas globally consumer price indices are used. One conceptual flaw with this model is that it assumes that the base exchange rate is the correct exchange rate or represents the purchasing power parities accurately, which may not be the case.

BASE RATE

What is base rate?

It is the minimum lending rate that banks can charge their customers from July 1, 2010. So far, all lending rates were pegged to a bank’s prime lending rate (PLR). Under the existing system, banks charge customers interest rate either above the PLR or below PLR. Thus PLR worked as an anchor rate. From July 1, the base rate will not only replace the PLR as the benchmark, but it will also be the new floor rate below which no bank can lend. India’s largest bank, the State Bank of India, has indicated that it plans to peg its base rate in the range of 7.5-8%.

What will happen to loans linked to PLR?

Outstanding loans that are linked to PLR will continue to exist alongside the new loans linked to the base rate. As the old loans get repaid or the contract comes up for renewal, the base rate will become the sole benchmark.

From July 1, on all new loans, banks will charge customers at base rate or above base rate, depending on the rating and relationship. As and when the loan contract comes for renewal, banks will link the interest rate to the base rate. Existing customers will also get a choice to migrate to base rate. Customers will not be charged any penalty if they wish to migrate from PLR to base rate before the contract is due for renewal.

Why is base rate being introduced?

It is aimed at bringing more transparency in the lending market. As of now, the prime customer bargain rate is below PLR while average to risky customers are charged at PLR or above PLR. About 70% of the loan given by banks is at rates below PLR. Some banks have lent at 6% when their PLR is 13%. As a result, a customer who is able to bargain the most get the best rate. In case of base rate, no bank will be able to lend below base rate, making lending rates comparable.

What will happen to home loan customers?

Home loans are long-term contracts and thus it does not come up for renewal like most other corporates loans. Therefore, banks may give all existing customers a choice to move to a base rate. There are instances of home loans where the interest rate is fixed for initial years and floating rate in following rates. Here, in subsequent years, interest rate is a few basis points below PLR when it moves to floating rate regime.

In such cases, the base rate will not implicitly replace PLR. If the loan document, for instance, says after three years home loan will be 300 bps below PLR, it would not mean that the loan would be 300 bps below base rate once the base rate regime comes into being. Because, in any way, no loan can be below the base rate.

CLOUD COMPUTING

Cloud computing is a colloquial expression used to describe a variety of different computing concepts that involve a large number of computers that are connected through a real-time communication network (typically theInternet). Cloud computing is a jargon term without a commonly accepted non-ambiguous scientific or technical definition. In science, cloud computing is a synonym for distributed computing over a network and means the ability to run a program on many connected computers at the same time. The popularity of the term can be attributed to its use in marketing to sell hosted services in the sense of application service provisioning that run client server software on a remote location.

Cloud computing logical diagram

Advantages

Cloud computing relies on sharing of resources to achieve coherence and economies of scale similar to a utility (like the electricity grid) over a network.^[2] At the foundation of cloud computing is the broader concept ofconverged infrastructure and shared services.

The cloud also focuses on maximizing the effectiveness of the shared resources. Cloud resources are usually not only shared by multiple users but as well as dynamically re-allocated as per demand. This can work for allocating resources to users in different time zones. For example, a cloud computer facility which serves European users during European business hours with a specific application (e.g. email) while the same resources are getting reallocated and serve North American users during North America's business hours with another application (e.g. web server). This approach should maximize the use of computing powers thus reducing environmental damage as well, since less power, air conditioning, rackspace, and so on, is required for the same functions.

The term moving cloud also refers to an organization moving away from a traditional capex model (buy the dedicated hardware and depreciate it over a period of time) to the opex model (use a shared cloud infrastructure and pay as you use it)

Proponents claim that cloud computing allows companies to avoid upfront infrastructure costs, and focus on projects that differentiate their businesses instead of infrastructure.^[3] Proponents also claim that cloud computing allows enterprises to get their applications up and running faster, with improved manageability and less maintenance, and enables IT to more rapidly adjust resources to meet fluctuating and unpredictable business demand.^[3][4][5]

Hosted services

In marketing, cloud computing is mostly used to sell hosted services in the sense of Application Service Provisioning that run client server software on a remote location. Such services are given popular acronyms like 'SaaS' (Software as a Service), 'PaaS' (Platform as a Service). End users access cloud-based applications through a web browser or a light-weight desktop or mobile app while the business software and user's data are stored on servers at a remote location.

History

The 1950s

The underlying concept of cloud computing dates back to the 1950s, when large-scale mainframe computers became available in academia and corporations, accessible via thin clients/terminal computers, often referred to as "dumb terminals", because they were used for communications but had no internal computational capacities. To make more efficient use of costly mainframes, a practice evolved that allowed multiple users to share both the physical access to the computer from multiple terminals as well as to share the CPU time. This eliminated periods of inactivity on the mainframe and allowed for a greater return on the investment. The practice of sharing CPU time on a mainframe became known in the industry as time-sharing.^[6]

The 1960's–1990's

John McCarthy opined in the 1960s that "computation may someday be organized as a public utility."^[7] Almost all the modern-day characteristics of cloud computing (elastic provision, provided as a utility, online, illusion of infinite supply), the comparison to the electricity industry and the use of public, private, government, and community forms, were thoroughly explored in Douglas Parkhill's 1966 book, The Challenge of the Computer Utility. Other scholars have shown that cloud computing's roots go all the way back to the 1950s when scientist Herb Grosch (the author of Grosch's law) postulated that the entire world would operate on dumb terminals powered by about 15 large data centers.^[8] Due to the expense of these powerful computers, many corporations and other entities could avail themselves of computing capability through time sharing and several organizations, such as GE's GEISCO, IBM subsidiary The Service Bureau Corporation (SBC, founded in 1957), Tymshare (founded in 1966), National CSS (founded in 1967 and bought by Dun & Bradstreet in 1979), Dial Data (bought by Tymshare in 1968), and Bolt, Beranek and Newman (BBN) marketed time sharing as a commercial venture.

The 1990s

In the 1990s, telecommunications companies, who previously offered primarily dedicated point-to-point data circuits, began offering virtual private network (VPN) services with comparable quality of service, but at a lower cost. By switching traffic as they saw fit to balance server use, they could use overall network bandwidth more effectively. They began to use the cloud symbol to denote the demarcation point between what the provider was responsible for and what users were responsible for. Cloud computing extends this boundary to cover servers as well as the network infrastructure.^[9]

As computers became more prevalent, scientists and technologists explored ways to make large-scale computing power available to more users through time sharing, experimenting with algorithms to provide the optimal use of the infrastructure, platform and applications with prioritized access to the CPU and efficiency for the end users.^[10]

Since 2000

After the dot-com bubble, Amazon played a key role in all the development of cloud computing by modernizing their data centers, which, like most computer networks, were using as little as 10% of their capacity at any one time, just to leave room for occasional spikes. Having found that the new cloud architecture resulted in significant internal efficiency improvements whereby small, fast-moving "two-pizza teams" (teams small enough to feed with two pizzas) could add new features faster and more easily, Amazon initiated a new product development effort to provide cloud computing to external customers, and launched Amazon Web Services (AWS) on a utility computing basis in 2006.^[11][12]

In early 2008, Eucalyptus became the first open-source, AWS API-compatible platform for deploying private clouds. In early 2008, OpenNebula, enhanced in the RESERVOIR European Commission-funded project, became the first open-source software for deploying private and hybrid clouds, and for the federation of clouds.^[13] In the same year, efforts were focused on providing quality of service guarantees (as required by real-time interactive applications) to cloud-based infrastructures, in the framework of the IRMOS European Commission-funded project, resulting to a real-time cloud environment.^[14] By mid-2008, Gartner saw an opportunity for cloud computing "to shape the relationship among consumers of IT services, those who use IT services and those who sell them"^[15] and observed that "organizations are switching from company-owned hardware and software assets to per-use service-based models" so that the "projected shift to computing ... will result in dramatic growth in IT products in some areas and significant reductions in other areas."^[16]

On March 1, 2011, IBM announced the IBM SmartCloud framework to support Smarter Planet.^[17] Among the various components of the Smarter Computing foundation, cloud computing is a critical piece.

Growth and popularity

The development of the Internet from being document centric via semantic data towards more and more services was described as "Dynamic Web".^[18] This contribution focused in particular in the need for better meta-data able to describe not only implementation details but also conceptual details of model-based applications.

The ubiquitous availability of high-capacity networks, low-cost computers and storage devices as well as the widespread adoption of hardware virtualization, service-oriented architecture, autonomic, and utility computing have led to a growth in cloud computing.^[19][20][21]

Financials Cloud vendors are experiencing growth rates of 90% per annum.^[22]

Origin of the term

The origin of the term cloud computing is unclear. The expression cloud is commonly used in science to describe a large agglomeration of objects that visually appear from a distance as a cloud and describes any set of things whose details are not inspected further in a given context.

• Meteorology: a weather cloud is an agglomeration.
• Mathematics: a large number of points in a coordinate system in mathematics is seen as a point cloud;
• Astronomy: many stars that crowd together are seen as star clouds (also known as star mist) in the sky, e.g. the Milky Way;
• Physics: The indeterminate position of electrons around an atomic kernel appears like a cloud to a distant observer;
• Video Games: "The Cloud" was what followed Mario characters around, allowing them to store and access extra items;

In analogy to above usage the word cloud was used as a metaphor for the Internet and a standardized cloud-like shape was used to denote a network on telephony schematics and later to depict the Internet in computer network diagrams. The cloud symbol was used to represent the Internet as early as 1994.^[23][24] Servers were then shown connected to, but external to, the cloud symbol.

Urban legends claim that usage of the expression is directly derived from the practice of using drawings of stylized clouds to denote networks in diagrams of computing and communications systems.

The term became popular after Amazon.com introduced the Elastic Compute Cloud in 2006.

Similar systems and concepts

Cloud Computing is the result of evolution and adoption of existing technologies and paradigms. The goal of cloud computing is to allow users to take benefit from all of these technologies, without the need for deep knowledge about or expertise with each one of them. The cloud aims to cut costs, and help the users focus on their core business instead of being impeded by IT obstacles.^[25]

The main enabling technology for cloud computing is virtualization. Virtualization abstracts the physical infrastructure, which is the most rigid component, and makes it available as a soft component that is easy to use and manage. By doing so, virtualization provides the agility required to speed up IT operations, and reduces cost by increasing infrastructure utilization. On the other hand, autonomic computing automates the process through which the user can provision resources on-demand. By minimizing user involvement, automation speeds up the process and reduces the possibility of human errors.^[25]

Users face difficult business problems every day. Cloud computing adopts concepts from Service-oriented Architecture (SOA) that can help the user break these problems into services that can be integrated to provide a solution. Cloud computing provides all of its resources as services, and makes use of the well-established standards and best practices gained in the domain of SOA to allow global and easy access to cloud services in a standardized way.

Cloud computing also leverages concepts from utility computing in order to provide metrics for the services used. Such metrics are at the core of the public cloud pay-per-use models. In addition, measured services are an essential part of the feedback loop in autonomic computing, allowing services to scale on-demand and to perform automatic failure recovery.

Cloud computing is a kind of grid computing; it has evolved from grid computing by addressing the QoS (quality of service) and reliability problems. Cloud computing provides the tools and technologies to build data/compute intensive parallel applications with much more affordable prices compared to traditional parallel computing techniques.^[25]

Cloud computing shares characteristics with:

• Client–server model — Client–server computing refers broadly to any distributed application that distinguishes between service providers (servers) and service requesters (clients).^[26]
• Grid computing — "A form of distributed and parallel computing, whereby a 'super and virtual computer' is composed of a cluster of networked, loosely coupled computers acting in concert to perform very large tasks."
• Mainframe computer — Powerful computers used mainly by large organizations for critical applications, typically bulk data processing such as census, industry and consumer statistics, police and secret intelligence services, enterprise resource planning, and financial transaction processing.^[27]
• Utility computing — The "packaging of computing resources, such as computation and storage, as a metered service similar to a traditional public utility, such as electricity."^[28][29]
• Peer-to-peer means distributed architecture without the need for central coordination. Participants are both suppliers and consumers of resources (in contrast to the traditional client–server model).
• Cloud gaming—also known as on-demand gaming—is a way of delivering games to computers. Gaming data is stored in the provider's server, so that gaming is independent of client computers used to play the game.

Characteristics

Cloud computing exhibits the following key characteristics:

• Agility improves with users' ability to re-provision technological infrastructure resources.
• Application programming interface (API) accessibility to software that enables machines to interact with cloud software in the same way that a traditional user interface (e.g., a computer desktop) facilitates interaction between humans and computers. Cloud computing systems typically use Representational State Transfer (REST)-based APIs.
• Cost is claimed to be reduced, and in a public cloud delivery model capital expenditure is converted to operational expenditure.^[30] This is purported to lower barriers to entry, as infrastructure is typically provided by a third-party and does not need to be purchased for one-time or infrequent intensive computing tasks. Pricing on a utility computing basis is fine-grained with usage-based options and fewer IT skills are required for implementation (in-house).^[31] The e-FISCAL project's state of the art repository^[32] contains several articles looking into cost aspects in more detail, most of them concluding that costs savings depend on the type of activities supported and the type of infrastructure available in-house.
• Device and location independence^[33] enable users to access systems using a web browser regardless of their location or what device they are using (e.g., PC, mobile phone). As infrastructure is off-site (typically provided by a third-party) and accessed via the Internet, users can connect from anywhere.^[31]
• Virtualization technology allows servers and storage devices to be shared and utilization be increased. Applications can be easily migrated from one physical server to another.
• Multitenancy enables sharing of resources and costs across a large pool of users thus allowing for:
  • Centralization of infrastructure in locations with lower costs (such as real estate, electricity, etc.)
  • Peak-load capacity increases (users need not engineer for highest possible load-levels)
  • Utilisation and efficiency improvements for systems that are often only 10–20% utilised.^[11][34]
• Reliability is improved if multiple redundant sites are used, which makes well-designed cloud computing suitable for business continuity and disaster recovery.^[35]
• Scalability and elasticity via dynamic ("on-demand") provisioning of resources on a fine-grained, self-service basis near real-time,^[36][37] without users having to engineer for peak loads.^[38][39][40]
• Performance is monitored, and consistent and loosely coupled architectures are constructed using web services as the system interface.^[31]
• Security could improve due to centralization of data, increased security-focused resources, etc., but concerns can persist about loss of control over certain sensitive data, and the lack of security for stored kernels.^[41]Security is often as good as or better than other traditional systems, in part because providers are able to devote resources to solving security issues that many customers cannot afford.^[42] However, the complexity of security is greatly increased when data is distributed over a wider area or greater number of devices and in multi-tenant systems that are being shared by unrelated users. In addition, user access to security audit logs may be difficult or impossible. Private cloud installations are in part motivated by users' desire to retain control over the infrastructure and avoid losing control of information security.
• Maintenance of cloud computing applications is easier, because they do not need to be installed on each user's computer and can be accessed from different places.

The National Institute of Standards and Technology's definition of cloud computing identifies "five essential characteristics":

On-demand self-service. A consumer can unilaterally provision computing capabilities, such as server time and network storage, as needed automatically without requiring human interaction with each service provider.

Broad network access. Capabilities are available over the network and accessed through standard mechanisms that promote use by heterogeneous thin or thick client platforms (e.g., mobile phones, tablets, laptops, and workstations).

Resource pooling. The provider's computing resources are pooled to serve multiple consumers using a multi-tenant model, with different physical and virtual resources dynamically assigned and reassigned according to consumer demand. ...

Rapid elasticity. Capabilities can be elastically provisioned and released, in some cases automatically, to scale rapidly outward and inward commensurate with demand. To the consumer, the capabilities available for provisioning often appear unlimited and can be appropriated in any quantity at any time.

Measured service. Cloud systems automatically control and optimize resource use by leveraging a metering capability at some level of abstraction appropriate to the type of service (e.g., storage, processing, bandwidth, and active user accounts). Resource usage can be monitored, controlled, and reported, providing transparency for both the provider and consumer of the utilized service.

—National Institute of Standards and Technology^[2]

On-demand self-service

See also: Self-service provisioning for cloud computing services and Service catalogs for cloud computing services

On-demand self-service allows users to obtain, configure and deploy cloud services themselves using cloud service catalogues, without requiring the assistance of IT.^[43][44] This feature is listed by the National Institute of Standards and Technology (NIST) as a characteristic of cloud computing.^[2]

The self-service requirement of cloud computing prompts infrastructure vendors to create cloud computing templates, which are obtained from cloud service catalogues. Manufacturers of such templates or blueprints includeBMC Software (BMC), with Service Blueprints as part of their cloud management platform^[45] Hewlett-Packard (HP), which names its templates as HP Cloud Maps^[46] RightScale^[47] and Red Hat, which names its templates CloudForms.^[48]

The templates contain predefined configurations used by consumers to set up cloud services. The templates or blueprints provide the technical information necessary to build ready-to-use clouds.^[47] Each template includes specific configuration details for different cloud infrastructures, with information about servers for specific tasks such as hosting applications, databases, websites and so on.^[47] The templates also include predefined Web service, the operating system, the database, security configurations and load balancing.^[48]

Cloud computing consumers use cloud templates to move applications between clouds through a self-service portal. The predefined blueprints define all that an application requires to run in different environments. For example, a template could define how the same application could be deployed in cloud platforms based on Amazon Web Service, VMware or Red Hat.^[49] The user organization benefits from cloud templates because the technical aspects of cloud configurations reside in the templates, letting users to deploy cloud services with a push of a button.^[50][51] Cloud templates can also be used by developers to create a catalog of cloud services.^[52]

Service models

Cloud computing providers offer their services according to several fundamental models:^[2][53] infrastructure as a service (IaaS), platform as a service (PaaS), and software as a service (SaaS) where IaaS is the most basic and each higher model abstracts from the details of the lower models. Other key components in XaaS are described in a comprehensive taxonomy model published in 2009,^[54] such as Strategy-as-a-Service, Collaboration-as-a-Service, Business Process-as-a-Service, Database-as-a-Service, etc. In 2012, network as a service (NaaS) and communication as a service (CaaS) were officially included by ITU (International Telecommunication Union) as part of the basic cloud computing models, recognized service categories of a telecommunication-centric cloud ecosystem.^[55]

Infrastructure as a service (IaaS)

See also: Category:Cloud infrastructure

In the most basic cloud-service model, providers of IaaS offer computers - physical or (more often) virtual machines - and other resources. (A hypervisor, such asXen or KVM, runs the virtual machines as guests. Pools of hypervisors within the cloud operational support-system can support large numbers of virtual machines and the ability to scale services up and down according to customers' varying requirements.) IaaS clouds often offer additional resources such as a virtual-machinedisk image library, raw (block) and file-based storage, firewalls, load balancers, IP addresses, virtual local area networks (VLANs), and software bundles.^[56]IaaS-cloud providers supply these resources on-demand from their large pools installed in data centers. For wide-area connectivity, customers can use either the Internet or carrier clouds (dedicated virtual private networks).

To deploy their applications, cloud users install operating-system images and their application software on the cloud infrastructure. In this model, the cloud user patches and maintains the operating systems and the application software. Cloud providers typically bill IaaS services on a utility computing basis^{[citation needed]}: cost reflects the amount of resources allocated and consumed.

Examples of IaaS providers include: Amazon EC2, AirVM, Azure Services Platform, DynDNS, Google Compute Engine, HP Cloud, iland, Joyent, LeaseWeb,Linode, NaviSite, Oracle Infrastructure as a Service, Rackspace, ReadySpace Cloud Services, ReliaCloud, Savvis, SingleHop, and Terremark

The spending on cloud service is expected to show the largest increase in the IT marketplace, with North Africa and the Middle East having growth of over 20% through 2016, according to analysts at Gartner. The first cloud service in the United Arab Emirates for SMBs and enterprises was announced June 2013 when the leading telecom operator in the Middle East and AfricaEtisalat launched its first cloud service in the UAE. IaaS cloud model was believed to reduce IT costs up to 60% and time to market faster by up to 90%.

Cloud communications and cloud telephony, rather than replacing local computing infrastructure, replace local telecommunications infrastructure with Voice over IP and other off-site Internet services.

Platform as a service (PaaS)

In the PaaS model, cloud providers deliver a computing platform typically including operating system, programming language execution environment, database, and web server. Application developers can develop and run their software solutions on a cloud platform without the cost and complexity of buying and managing the underlying hardware and software layers. With some PaaS offers, the underlying computer and storage resources scale automatically to match application demand such that cloud user does not have to allocate resources manually.

Examples of PaaS include: AWS Elastic Beanstalk, Cloud Foundry, Heroku, Force.com, EngineYard, Mendix, OpenShift, Google App Engine, AppScale, Windows Azure Cloud Services, OrangeScape and Jelastic.

Software as a service (SaaS)

Main article: Software as a service

In the business model using software as a service (SaaS), users are provided access to application software and databases. Cloud providers manage the infrastructure and platforms that run the applications. SaaS is sometimes referred to as "on-demand software" and is usually priced on a pay-per-use basis. SaaS providers generally price applications using a subscription fee.

In the SaaS model, cloud providers install and operate application software in the cloud and cloud users access the software from cloud clients. Cloud users do not manage the cloud infrastructure and platform where the application runs. This eliminates the need to install and run the application on the cloud user's own computers, which simplifies maintenance and support. Cloud applications are different from other applications in their scalability—which can be achieved by cloning tasks onto multiple virtual machines at run-time to meet changing work demand.^[57] Load balancers distribute the work over the set of virtual machines. This process is transparent to the cloud user, who sees only a single access point. To accommodate a large number of cloud users, cloud applications can be multitenant, that is, any machine serves more than one cloud user organization. It is common to refer to special types of cloud based application software with a similar naming convention: desktop as a service, business process as a service, test environment as a service, communication as a service.

The pricing model for SaaS applications is typically a monthly or yearly flat fee per user,^[58] so price is scalable and adjustable if users are added or removed at any point.^[59]

Examples of SaaS include: Google Apps, Microsoft Office 365, Petrosoft, Onlive, GT Nexus, Marketo, Casengo, TradeCard, Salesforce and CallidusCloud.

Proponents claim SaaS allows a business the potential to reduce IT operational costs by outsourcing hardware and software maintenance and support to the cloud provider. This enables the business to reallocate IT operations costs away from hardware/software spending and personnel expenses, towards meeting other goals. In addition, with applications hosted centrally, updates can be released without the need for users to install new software. One drawback of SaaS is that the users' data are stored on the cloud provider's server. As a result, there could be unauthorized access to the data.

Network as a service (NaaS)

Main article: Network as a service

A category of cloud services where the capability provided to the cloud service user is to use network/transport connectivity services and/or inter-cloud network connectivity services.^[60] NaaS involves the optimization of resource allocations by considering network and computing resources as a unified whole.^[61]

Traditional NaaS services include flexible and extended VPN, and bandwidth on demand.^[60] NaaS concept materialization also includes the provision of a virtual network service by the owners of the network infrastructure to a third party (VNP – VNO).^[62][63]

Cloud clients

See also: Category:Cloud clients

Users access cloud computing using networked client devices, such as desktop computers, laptops, tablets and smartphones. Some of these devices - cloud clients - rely on cloud computing for all or a majority of their applications so as to be essentially useless without it. Examples are thin clients and the browser-based Chromebook. Many cloud applications do not require specific software on the client and instead use a web browser to interact with the cloud application. With Ajax and HTML5 these Web user interfaces can achieve a similar, or even better, look and feel to native applications. Some cloud applications, however, support specific client software dedicated to these applications (e.g., virtual desktop clients and most email clients). Some legacy applications (line of business applications that until now have been prevalent in thin client computing) are delivered via a screen-sharing technology.

Deployment models

Cloud computing types

Private cloud

Private cloud is cloud infrastructure operated solely for a single organization, whether managed internally or by a third-party and hosted internally or externally.^[2] Undertaking a private cloud project requires a significant level and degree of engagement to virtualize the business environment, and requires the organization to reevaluate decisions about existing resources. When done right, it can improve business, but every step in the project raises security issues that must be addressed to prevent serious vulnerabilities.^[64]

They have attracted criticism because users "still have to buy, build, and manage them" and thus do not benefit from less hands-on management,^[65]essentially "[lacking] the economic model that makes cloud computing such an intriguing concept".^[66][67]

Comparison for SaaS

	Public cloud	Private cloud
Initial cost	Typically zero	Typically high
Running cost	Predictable	Unpredictable
Customization	Impossible	Possible
Privacy	No (Host has access to the data)	Yes
Single sign-on	Impossible	Possible
Scaling up	Easy while within defined limits	Laborious but no limits

Public cloud

A cloud is called a 'Public cloud' when the services are rendered over a network that is open for public use. Technically there is no difference between public and private cloud architecture, however, security consideration may be substantially different for services (applications, storage, and other resources) that are made available by a service provider for a public audience and when communication is effected over a non-trusted network. Generally, public cloud service providers like Amazon AWS, Microsoft and Google own and operate the infrastructure and offer access only via Internet (direct connectivity is not offered).^[31]

Community cloud

Community cloud shares infrastructure between several organizations from a specific community with common concerns (security, compliance, jurisdiction, etc.), whether managed internally or by a third-party and hosted internally or externally. The costs are spread over fewer users than a public cloud (but more than a private cloud), so only some of the cost savings potential of cloud computing are realized.^[2]

Hybrid cloud

Hybrid cloud is a composition of two or more clouds (private, community or public) that remain unique entities but are bound together, offering the benefits of multiple deployment models.^[2] Such composition expands deployment options for cloud services, allowing IT organizations to use public cloud computing resources to meet temporary needs.^[68] This capability enables hybrid clouds to employ cloud bursting for scaling across clouds.^[2]

Cloud bursting is an application deployment model in which an application runs in a private cloud or data center and "bursts" to a public cloud when the demand for computing capacity increases. A primary advantage of cloud bursting and a hybrid cloud model is that an organization only pays for extra compute resources when they are needed.^[69]

Cloud bursting enables data centers to create an in-house IT infrastructure that supports average workloads, and use cloud resources from public or private clouds, during spikes in processing demands.^[70]

By utilizing "hybrid cloud" architecture, companies and individuals are able to obtain degrees of fault tolerance combined with locally immediate usability without dependency on internet connectivity. Hybrid cloud architecture requires both on-premises resources and off-site (remote) server-based cloud infrastructure.

Hybrid clouds lack the flexibility, security and certainty of in-house applications.^[71] Hybrid cloud provides the flexibility of in house applications with the fault tolerance and scalability of cloud based services.

Architecture

Cloud computing sample architecture

Cloud architecture,^[72] the systems architecture of the software systems involved in the delivery of cloud computing, typically involves multiple cloud componentscommunicating with each other over a loose coupling mechanism such as a messaging queue. Elastic provision implies intelligence in the use of tight or loose coupling as applied to mechanisms such as these and others.

The Intercloud

Main article: Intercloud

The Intercloud^[73] is an interconnected global "cloud of clouds"^[74][75] and an extension of the Internet "network of networks" on which it is based.^[76][77][78]

Cloud engineering

Cloud engineering is the application of engineering disciplines to cloud computing. It brings a systematic approach to the high-level concerns of commercialisation, standardisation, and governance in conceiving, developing, operating and maintaining cloud computing systems. It is a multidisciplinary method encompassing contributions from diverse areas such as systems, software, web, performance, information, security, platform, risk, and quality engineering.

Issues

Threats and opportunities of the cloud

Critical voices including GNU project initiator Richard Stallman and Oracle founder Larry Ellison warned that the whole concept is rife with privacy and ownership concerns and constitute merely a fad.^[79]

However, cloud computing continues to gain steam^[80] with 56% of the major European technology decision-makers estimate that the cloud is a priority in 2013 and 2014, and the cloud budget may reach 30% of the overall IT budget.^{[citation needed][81]}

According to the TechInsights Report 2013: Cloud Succeeds based on a survey, the cloud implementations generally meets or exceedes expectations across major service models, such as Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and Software as a Service (SaaS)".^[82]

Several deterrents to the widespread adoption of cloud computing remain. Among them, are: reliability, availability of services and data, security, complexity, costs, regulations and legal issues, performance, migration, reversion, the lack of standards, limited customization and issues of privacy. The cloud offers many strong points: infrastructure flexibility, faster deployment of applications and data, cost control, adaptation of cloud resources to real needs, improved productivity, etc. The early 2010s cloud market is dominated by software and services in SaaS mode and IaaS (infrastructure), especially the private cloud. PaaS and the public cloud are further back.

Privacy

Privacy advocates have criticized the cloud model for giving hosting companies' greater ease to control—and thus, to monitor at will—communication between host company and end user, and access user data (with or without permission). Instances such as the secret NSA program, working with AT&T, and Verizon, which recorded over 10 million telephone calls between American citizens, causes uncertainty among privacy advocates, and the greater powers it gives to telecommunication companies to monitor user activity.^[83][84] A cloud service provider (CSP) can complicate data privacy because of the extent of virtualization (virtual machines) and cloud storage used to implement cloud service.^[85] CSP operations, customer or tenant data may not remain on the same system, or in the same data center or even within the same provider's cloud; this can lead to legal concerns over jurisdiction. While there have been efforts (such as US-EU Safe Harbor) to "harmonise" the legal environment, providers such as Amazon still cater to major markets (typically the United States and the European Union) by deploying local infrastructure and allowing customers to select "availability zones."^[86] Cloud computing poses privacy concerns because the service provider may access the data that is on the cloud at any point in time. They could accidentally or deliberately alter or even delete information.^[87]

Postage and delivery services company Pitney Bowes launched Volly, a cloud-based, digital mailbox service to leverage its communication management assets. They also faced the technical challenge of providing strong data security and privacy. However, they were able to address the same concern by applying customized, application-level security, including encryption.^[88]

Compliance

To comply with regulations including FISMA, HIPAA, and SOX in the United States, the Data Protection Directive in the EU and the credit card industry's PCI DSS, users may have to adopt community or hybriddeployment modes that are typically more expensive and may offer restricted benefits. This is how Google is able to "manage and meet additional government policy requirements beyond FISMA"^[89][90] and Rackspace Cloud or QubeSpace are able to claim PCI compliance.^[91]

Many providers also obtain a SAS 70 Type II audit, but this has been criticised on the grounds that the hand-picked set of goals and standards determined by the auditor and the auditee are often not disclosed and can vary widely.^[92] Providers typically make this information available on request, under non-disclosure agreement.^[93][94]

Customers in the EU contracting with cloud providers outside the EU/EEA have to adhere to the EU regulations on export of personal data.^[95]

U.S. Federal Agencies have been directed by the Office of Management and Budget to use a process called FedRAMP (Federal Risk and Authorization Management Program) to assess and authorize cloud products and services. Federal CIO Steven VanRoekel issued a memorandum to federal agency Chief Information Officers on December 8, 2011 defining how federal agencies should use FedRAMP. FedRAMP consists of a subset of NIST Special Publication 800-53 security controls specifically selected to provide protection in cloud environments. A subset has been defined for the FIPS 199 low categorization and the FIPS 199 moderate categorization. The FedRAMP program has also established a Joint Accreditation Board (JAB) consisting of Chief Information Officers from DoD, DHS and GSA. The JAB is responsible for establishing accreditation standards for 3rd party organizations who perform the assessments of cloud solutions. The JAB also reviews authorization packages, and may grant provisional authorization (to operate). The federal agency consuming the service still has final responsibility for final authority to operate.^[96]

A multitude of laws and regulations have forced specific compliance requirements onto many companies that collect, generate or store data. These policies may dictate a wide array of data storage policies, such as how long information must be retained, the process used for deleting data, and even certain recovery plans. Below are some examples of compliance laws or regulations.

• In the United States, the Health Insurance Portability and Accountability Act (HIPAA) requires a contingency plan that includes, data backups, data recovery, and data access during emergencies.
• The privacy laws of the Switzerland demand that private data, including emails, be physically stored in the Switzerland.
• In the United Kingdom, the Civil Contingencies Act of 2004 sets forth guidance for a Business contingency plan that includes policies for data storage.

In a virtualized cloud computing environment, customers may never know exactly where their data is stored. In fact, data may be stored across multiple data centers in an effort to improve reliability, increase performance, and provide redundancies. This geographic dispersion may make it more difficult to ascertain legal jurisdiction if disputes arise.^[97]

Legal

As with other changes in the landscape of computing, certain legal issues arise with cloud computing, including trademark infringement, security concerns and sharing of proprietary data resources.

The Electronic Frontier Foundation has criticized the United States government for considering during the Megaupload seizure process that people lose property rights by storing data on a cloud computing service.^[98]

One important but not often mentioned problem with cloud computing is the problem of who is in "possession" of the data. If a cloud company is the possessor of the data, the possessor has certain legal rights. If the cloud company is the "custodian" of the data, then a different set of rights would apply. The next problem in the legalities of cloud computing is the problem of legal ownership of the data. Many Terms of Service agreements are silent on the question of ownership.^[99]

These legal issues are not confined to the time period in which the cloud based application is actively being used. There must also be consideration for what happens when the provider-customer relationship ends. In most cases, this event will be addressed before an application is deployed to the cloud. However, in the case of provider insolvencies or bankruptcy the state of the data may become blurred.^[97]

Vendor lock-in

Because cloud computing is still relatively new, standards are still being developed.^[100] Many cloud platforms and services are proprietary, meaning that they are built on the specific standards, tools and protocols developed by a particular vendor for its particular cloud offering.^[100] This can make migrating off a proprietary cloud platform prohibitively complicated and expensive.^[100]

Three types of vendor lock-in can occur with cloud computing:^[101]

• Platform lock-in: cloud services tend to be built on one of several possible virtualization platforms, for example VMWare or Xen. Migrating from a cloud provider using one platform to a cloud provider using a different platform could be very complicated.
• Data lock-in: since the cloud is still new, standards of ownership, i.e. who actually owns the data once it lives on a cloud platform, are not yet developed, which could make it complicated if cloud computing users ever decide to move data off of a cloud vendor's platform.
• Tools lock-in: if tools built to manage a cloud environment are not compatible with different kinds of both virtual and physical infrastructure, those tools will only be able to manage data or apps that live in the vendor's particular cloud environment.

Heterogeneous cloud computing is described as a type of cloud environment that prevents vendor lock-in, and aligns with enterprise data centers that are operating hybrid cloud models.^[102] The absence of vendor lock-in lets cloud administrators select his or her choice of hypervisors for specific tasks, or to deploy virtualized infrastructures to other enterprises without the need to consider the flavor of hypervisor in the other enterprise.^[103]

A heterogeneous cloud is considered one that includes on-premise private clouds, public clouds and software-as-a-service clouds. Heterogeneous clouds can work with environments that are not virtualized, such as traditional data centers.^[104] Heterogeneous clouds also allow for the use of piece parts, such as hypervisors, servers, and storage, from multiple vendors.^[105]

Cloud piece parts, such as cloud storage systems, offer APIs but they are often incompatible with each other.^[106] The result is complicated migration between backends, and makes it difficult to integrate data spread across various locations.^[106] This has been described as a problem of vendor lock-in.^[106] The solution to this is for clouds to adopt common standards.^[106]

Heterogeneous cloud computing differs from homogeneous clouds, which have been described as those using consistent building blocks supplied by a single vendor.^[107] Intel General Manager of high-density computing, Jason Waxman, is quoted as saying that a homogenous system of 15,000 servers would cost $6 million more in capital expenditure and use 1 megawatt of power.

Open source

Open-source software has provided the foundation for many cloud computing implementations, prominent examples being the Hadoop framework^[108] and VMware's Cloud Foundry.^[109] In November 2007, the Free Software Foundation released the Affero General Public License, a version of GPLv3 intended to close a perceived legal loophole associated with free software designed to run over a network.

Open standards

Most cloud providers expose APIs that are typically well-documented (often under a Creative Commons license^[111]) but also unique to their implementation and thus not interoperable. Some vendors have adopted others' APIs and there are a number of open standards under development, with a view to delivering interoperability and portability.^[112] As of November 2012, the Open Standard with broadest industry support is probablyOpenStack, founded in 2010 by NASA and Rackspace, and now governed by the OpenStack Foundation.^[113] OpenStack supporters include AMD, Intel, Canonical, SUSE Linux, Red Hat, Cisco, Dell, HP, IBM, Yahooand now VMware.

Security

As cloud computing is achieving increased popularity, concerns are being voiced about the security issues introduced through adoption of this new model. The effectiveness and efficiency of traditional protection mechanisms are being reconsidered as the characteristics of this innovative deployment model can differ widely from those of traditional architectures^] An alternative perspective on the topic of cloud security is that this is but another, although quite broad, case of "applied security" and that similar security principles that apply in shared multi-user mainframe security models apply with cloud security

The relative security of cloud computing services is a contentious issue that may be delaying its adoption. Physical control of the Private Cloud equipment is more secure than having the equipment off site and under someone else's control. Physical control and the ability to visually inspect data links and access ports is required in order to ensure data links are not compromised. Issues barring the adoption of cloud computing are due in large part to the private and public sectors' unease surrounding the external management of security-based services. It is the very nature of cloud computing-based services, private or public, that promote external management of provided services. This delivers great incentive to cloud computing service providers to prioritize building and maintaining strong management of secure services.Security issues have been categorised into sensitive data access, data segregation, privacy, bug exploitation, recovery, accountability, malicious insiders, management console security, account control, and multi-tenancy issues. Solutions to various cloud security issues vary, from cryptography, particularly public key infrastructure (PKI), to use of multiple cloud providers, standardisation of APIs, and improving virtual machine support and legal support.

Cloud computing offers many benefits, but is vulnerable to threats. As cloud computing uses increase, it is likely that more criminals find new ways to exploit system vulnerabilities. Many underlying challenges and risks in cloud computing increase the threat of data compromise. To mitigate the threat, cloud computing stakeholders should invest heavily in risk assessment to ensure that the system encrypts to protect data, establishes trusted foundation to secure the platform and infrastructure, and builds higher assurance into auditing to strengthen compliance. Security concerns must be addressed to maintain trust in cloud computing technology.^[1]

Sustainability

Although cloud computing is often assumed to be a form of green computing, no published study substantiates this assumption.^[121] Citing the servers' effects on the environmental effects of cloud computing, in areas where climate favors natural cooling and renewable electricity is readily available, the environmental effects will be more moderate. (The same holds true for "traditional" data centers.) Thus countries with favorable conditions, such as Finland,^[122] Sweden and Switzerland,^[123] are trying to attract cloud computing data centers. Energy efficiency in cloud computing can result from energy-aware scheduling and server consolidation.^[124] However, in the case of distributed clouds over data centers with different source of energies including renewable source of energies, a small compromise on energy consumption reduction could result in high carbon footprint reduction.^[125]

Abuse

As with privately purchased hardware, customers can purchase the services of cloud computing for nefarious purposes. This includes password cracking and launching attacks using the purchased services. In 2009, a banking trojan illegally used the popular Amazon service as a command and control channel that issued software updates and malicious instructions to PCs that were infected by the malware.

IT governance

The introduction of cloud computing requires an appropriate IT governance model to ensure a secured computing environment and to comply with all relevant organizational information technology policies.As such, organizations need a set of capabilities that are essential when effectively implementing and managing cloud services, including demand management, relationship management, data security management, application lifecycle management, risk and compliance management. A danger lies with the explosion of companies joining the growth in cloud computing by becoming providers. However, many of the infrastructural and logistical concerns regarding the operation of cloud computing businesses are still unknown. This over-saturation may have ramifications for the industry as whole.

Consumer end storage

The increased use of cloud computing could lead to a reduction in demand for high storage capacity consumer end devices, due to cheaper low storage devices that stream all content via the cloud becoming more popular. In a Wired article, Jake Gardner explains that while unregulated usage is beneficial for IT and tech moguls like Amazon, the anonymous nature of the cost of consumption of cloud usage makes it difficult for business to evaluate and incorporate it into their business plans.^[131] The popularity of cloud and cloud computing in general is so quickly increasing among all sorts of companies, that in May 2013, through its company Amazon Web Services, Amazon started a certification program for cloud computing professionals.

Ambiguity of terminology

Outside of the information technology and software industry, the term "cloud" can be found to reference a wide range of services, some of which fall under the category of cloud computing, while others do not. The cloud is often used to refer to a product or service that is discovered, accessed and paid for over the Internet, but is not necessarily a computing resource. Examples of service that are sometimes referred to as "the cloud" include, but are not limited to, crowd sourcing, cloud printing, crowd funding, cloud manufacturing.

Performance interference and noisy neighbors

Due to its multi-tenant nature and resource sharing, Cloud computing must also deal with the "noisy neighbor" effect. This effect in essence indicates that in a shared infrastructure, the activity of a virtual machine on a neighboring core on the same physical host may lead to increased performance degradation of the VMs in the same physical host, due to issues such as e.g. cache contamination. Due to the fact that the neighboring VMs may be activated or deactivated at arbitrary times, the result is an increased variation in the actual performance of Cloud resources. This effect seems to be dependent also on the nature of the applications that run inside the VMs but also other factors such as scheduling parameters and the careful selection may lead to optimized assignment in order to minimize the phenomenon.^[134]

Research

Many universities, vendors, Institutes and government organizations are investing in research around the topic of cloud computing:

• In October 2007, the Academic Cloud Computing Initiative (ACCI) was announced as a multi-university project designed to enhance students' technical knowledge to address the challenges of cloud computing.

• In April 2009, UC Santa Barbara released the first open source platform-as-a-service, AppScale, which is capable of running Google App Engine applications at scale on a multitude of infrastructures.

• In April 2009, the St Andrews Cloud Computing Co-laboratory was launched, focusing on research in the important new area of cloud computing. Unique in the UK, StACC aims to become an international centre of excellence for research and teaching in cloud computing and provides advice and information to businesses interested in cloud-based services.

• In October 2010, the TClouds (Trustworthy Clouds) project was started, funded by the European Commission's 7th Framework Programme. The project's goal is to research and inspect the legal foundation and architectural design to build a resilient and trustworthy cloud-of-cloud infrastructure on top of that. The project also develops a prototype to demonstrate its results.^[139]

• In December 2010, the TrustCloud research project ^[140][141] was started by HP Labs Singapore to address transparency and accountability of cloud computing via detective, data-centric approaches^[142] encapsulated in a five-layer TrustCloud Framework. The team identified the need for monitoring data life cycles and transfers in the cloud,^[140] leading to the tackling of key cloud computing security issues such as cloud data leakages, cloud accountability and cross-national data transfers in transnational clouds.

• In June 2011, two Indian Universities i.e. University of Petroleum and Energy Studies and University of Technology and Management introduced cloud computing as a subject in India, in collaboration with IBM.^[143]

• In July 2011, the High Performance Computing Cloud (HPCCLoud) project was kicked-off aiming at finding out the possibilities of enhancing performance on cloud environments while running the scientific applications - development of HPCCLoud Performance Analysis Toolkit which was funded by CIM-Returning Experts Programme - under the coordination of Prof. Dr. Shajulin Benedict.

• In June 2011, the Telecommunications Industry Association developed a Cloud Computing White Paper, to analyze the integration challenges and opportunities between cloud services and traditional U.S. telecommunications standards.^[144]

• In December 2012, a study released by Microsoft and the International Data Corporation (IDC)showed that millions of cloud-skilled workers would be needed. Millions of cloud-related IT jobs are sitting open and millions more will open in the coming couple of years, due to a shortage in cloud-certified IT workers.

• In February 2013, the BonFIRE project launched a multi-site cloud experimentation and testing facility. The facility provides transparent access to cloud resources, with the control and observability necessary to engineer future cloud technologies, in a way that is not restricted, for example, by current business models.^[145]

• In April 2013, A 2013 report by IT research and advisory firm Gartner., Inc. says that app developers will embrace cloud services, predicting that in three years, 40% of the mobile app development projects will use cloud backed services. Cloud mobile backed services offer a new kind of PaaS, used to enable the development of mobile apps.

Early references in popular culture

In the 1966 Star Trek episode "Miri," Dr. McCoy, while stationed planetside, uses the computer of the orbiting Enterprise to process the data gathered by his portable equipment.