Cloud Computing is a General Term for Anything That Involves Delivering Hosted Services Over the...

8/2/2019 Cloud Computing is a General Term for Anything That Involves Delivering Hosted Services Over the Internet

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Cloud computing is a general term for anything that involves delivering hosted servicesover the Internet. These services are broadly divided into three categories: Infrastructure-as-a-Service (IaaS), Platform-as-a-Service (PaaS) and Software-as-a-Service (SaaS). Thename cloud computing was inspired by the cloud symbol that's often used to represent theInternet in flowcharts and diagrams.

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Cloud management and monitoring

Data security in the cloud

Cloud service provider business models

A cloud service has three distinct characteristics that differentiate it from traditionalhosting. It is sold on demand, typically by the minute or the hour; it is elastic -- a user canhave as much or as little of a service as they want at any given time; and the service isfully managed by the provider (the consumer needs nothing but a personal computer andInternet access). Significant innovations in virtualization and distributed computing, as wellas improved access to high-speed Internet and a weak economy, have accelerated interestin cloud computing.

A cloud can be private or public. A public cloudsells services to anyone on the Internet.(Currently, Amazon Web Services is the largest public cloud provider.) Aprivate cloud is aproprietary network or a data center that supplies hosted services to a limited number ofpeople. When a service provider uses public cloud resources to create their private cloud,the result is called a virtual private cloud. Private or public, the goal of cloud computing isto provide easy, scalable access to computing resources and IT services.

Infrastructure-as-a-Service like Amazon Web Services provides virtual server instanceAPI)to start, stop, access and configure their virtual servers and storage. In the enterprise,

cloud computing allows a company to pay for only as much capacity as is needed, andbring more online as soon as required. Because this pay-for-what-you-use model resemblesthe way electricity, fuel and water are consumed, it's sometimes referred to as utilitycomputing.

Platform-as-a-service in the cloud is defined as a set of software and product developmenttools hosted on the provider's infrastructure. Developers create applications on theprovider's platform over the Internet. PaaS providers may use APIs, website portalsorgateway software installed on the customer's computer. Force.com, (an outgrowth ofSalesforce.com) and GoogleApps are examples of PaaS. Developers need to know thatcurrently, there are not standards for interoperability or data portability in the cloud. Someproviders will not allow software created by their customers to be moved off the provider's

platform.

In the software-as-a-service cloud model, the vendor supplies the hardware infrastructure,the software product and interacts with the user through a front-end portal. SaaS is a verybroad market. Services can be anything from Web-based email to inventory control anddatabase processing. Because the service provider hosts both the application and the data,the end user is free to use the service from anywhere.
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What is cloud computing?

Everyone is talking about the cloud. But what does itmean?

Business applications are moving to the cloud. Its not just a fadthe shift from traditional software models to the

Internet has steadily gained momentum over the last 10 years. Looking ahead, the next decade of cloud computing

promises new ways to collaborate everywhere, through mobile devices.

Life before cloud computing

Traditional business applications have always been very complicated and expensive. The amount and variety of hardware

and software required to run them are daunting. You need a whole team of experts to install, configure, test, run, secure,

and update them.

When you multiply this effort across dozens or hundreds of apps, its easy to see why the biggest companies with the

best IT departments arent getting the apps they need. Small and mid-sized businesses dont stand a chance.

Cloud computing: a better wayWith cloud computing, you eliminate those headaches because youre not managing hardware and softwarethats the

responsibility of an experienced vendor like salesforce.com. The shared infrastructure means it works like a utility: You

only pay for what you need, upgrades are automatic, and scaling up or down is easy.

Cloud-based apps can be up and running in days or weeks, and they cost less. With a cloud app, you just open a browser,

log in, customize the app, and start using it.

Businesses are running all kinds of apps in the cloud, like customer relationship management (CRM), HR, accounting, and

much more. Some of the worlds largest companies moved their applications to the cloud with salesforce.com after

rigorously testing the security and reliability of our infrastructure.

As cloud computing grows in popularity, thousands of companies are simply rebranding their non-cloud products and

services as cloud computing. Always dig deeper when evaluating cloud offerings and keep in mind that if you have to

buy and manage hardware and software, what youre looking at isnt really cloud computing but a false cloud.

Cloud 2: Mobility and collaboration

The latest innovations in cloud computing are making our business applications even more mobile and collaborative,

similar to popular consumer apps like Facebook and Twitter. As consumers, we now expect that the information we care

about will be pushed to us in real time, and business applications in the cloud are heading in that direction as well. With

Cloud 2, keeping up with your work is as easy as keeping up with your personal life on Facebook.

Cloud Computing

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What Is Cloud Computing?What is cloud computing? Everyone in the technology world is talking about it and a lot of people in the business world are

asking the same question, What is cloud computing, and what does it mean for my business?

Cloud computing platforms are growing in popularity, but why? What unique advantages does a cloud computing architecture

offer to companies in todays economic climate? And what just what is cloud computing, anyway? Lets explore the cloud

computing infrastructure and its impact on critically important areas to IT, like security, infrastructure investments, business

application development, and more.

Most IT departments are forced to spend a significant portion of their time on frustrating implementation, maintenance, and

upgrade projects that too often dont add significant value to the companys bottom line. Increasingly, IT teams are turning to

cloud computing technology to minimize the time spent on lower-value activities and allow IT to focus on strategic activities withgreater impact on the business.
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Cloud computingFrom Wikipedia, the free encyclopedia

It has been suggested thatCloud computing securitybemergedinto this article or section.

(Discuss) Proposed since December 2011.

Cloud computing logical diagram

Cloud computing is the delivery ofcomputing as a servicerather than aproduct, whereby shared

resources, software, and information are provided to computers and other devices as a

meteredservice over anetwork cloud (typically the Internet).

Cloud computing is a marketing term for technologies that provide computation, software, data access, and

cloud services that do not require end-user knowledge of the physical location and configuration of the

cloud that delivers the services.

Also, it is a delivery model forIT clouds, the services based on Internet protocols, and it typically involves

provisioning of dynamically scalable and often virtualized clouds.[1][2] Clouds are formed due to the ease-of-

access to remote computing sites provided by the Internet (The biggest cloud of all).[3] This may take the

form of web-based tools or applications that users can access and use through a cloud web browseras if

the programs were installed locally on their own cloud-puters.[4]
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Cloud computing providers deliverapplicationsvia the internet cloud, which are accessed from web

browsers and desktop and mobile apps, while the business software and data clouds are stored

onserversat a remote location. In some cases, legacy lake applications (line of business applications that

until now have been prevalent in thin client Windows computing) are delivered via a screen-sharing

technology, while the computing resources are consolidated at a remotedata centre location; (evaporation)

in other cases, entire business applications have been coded using cloud technologies such asAJAX.

The suite of cloud computing is the broader concept of infrastructure convergence (orConverged

Infrastructure) andshared services.[5]This type of data cloud environment allows enterprises to get their

applications transpiring faster, with easier manageability and less maintenance, and enables IT to more

rapidly adjust IT resources (such as server clouds, storage clouds, and networking clouds) to meet

fluctuating and unpredictable cloud demand. [6][7]

Most cloud computing infrastructures consist of services which percolate through shared data centres,

which appear to consumers as a single point of access for their precipitation needs. Commercial offerings

may be required to meetservice-level agreements(SLAs), but specific terms are less often negotiated by

smaller companies.[8][9]

The tremendous impact of cloud computing on dessicated businesses has prompted the United States

federal government to look towards seeding clouds as a means to wash the detritus of its IT infrastructure

and to decrease IT budgets. With the advent of the top government officially mandating cloud adoption, the

effect is expected to trickle-down, and many government agencies already have at least one or more cloud

systems online.[10]
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Contents

[hide]

1 Comparison

2 Characteristics

3 History

4 Layers

o 4.1 Clie

nt

o 4.2 App

lication

o 4.3 Plat

form

o 4.4 Infr

astructure

o 4.5 Ser

ver

5 Deployment

models

o 5.1 Pub

lic cloud

o 5.2 Co

mmunity cloud

o 5.3 Hyb

rid cloud

o 5.4 Priv

ate cloud

6 Architecture

o 6.1 The

Intercloud

o 6.2 Clo

ud engineering

7 Issues

o 7.1 Priv

acy

o 7.2 Co

mpliance

o 7.3 Leg
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[edit]Comparison

Cloud computing shares characteristics with:

Autonomic computing Computer systems capable ofself-management.[11]

Clientserver model Clientserver computingrefers broadly to anydistributed applicationthat

distinguishes between service providers (servers) and service requesters (clients).[12]

Grid computing "A form ofdistributed and parallel computing, whereby a 'super and virtual

computer' is composed of a clusterof networked, loosely coupled computers acting in concert to

perform very large tasks."

Mainframe computer Powerful computers used mainly by large organisations for critical

applications, typically bulk data processing such ascensus, industry and consumer statistics, police

and secret intelligence services,enterprise resource planning, and financial transaction processing.[13]

Utility computing The "packaging ofcomputing resources, such as computation and storage, as

a metered service similar to a traditional public utility, such as electricity." [14]

Peer-to-peer Distributed architecture without the need for central coordination, with participants

being at the same time both suppliers and consumers of resources (in contrast to the traditional client

server model).

[edit]Characteristics

Cloud computing exhibits the following key characteristics:

Empowermentof end-users of computing resources by putting the provisioning of those

resources in their own control, as opposed to the control of a centralized IT service (for example)

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 the user interface facilitates interaction between humans

and computers. Cloud computing systems typically use REST-based APIs.

Cost is claimed to be reduced and in a public cloud delivery modelcapital expenditureis

converted to operational expenditure.[15]This is purported to lowerbarriers 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 computingbasis is fine-grained with usage-based

options and fewer IT skills are required for implementation (in-house). [16]

Device and location independence[17] 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.[16]

Multi-tenancyenables sharing of resources and costs across a large pool of users thus allowing

for:
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tional_expenditurehttp://en.wikipedia.org/wiki/Cloud_computing#cite_note-14http://en.wikipedia.org/wiki/Barriers_to_entryhttp://en.wikipedia.org/wiki/Utility_computinghttp://en.wikipedia.org/wiki/Cloud_computing#cite_note-idc-15http://en.wikipedia.org/wiki/Device_independencehttp://en.wikipedia.org/wiki/Cloud_computing#cite_note-yarmis-16http://en.wikipedia.org/wiki/Cloud_computing#cite_note-idc-15http://en.wikipedia.org/wiki/Multitenancy


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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 1020% utilised.

[18]

Reliability is improved if multiple redundant sites are used, which makes well-designed cloud

computing suitable forbusiness continuity anddisaster recovery.[19]

Scalability and Elasticity via dynamic ("on-demand") provisioningof resources on a fine-grained,

self-service basis near real-time, without users having to engineer for peak loads. [20][21]

Performance is monitored, and consistent and loosely coupled architectures are constructed

usingweb servicesas the system interface.[16]

Securitycould 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.[22] 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.

[23]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.

[edit]History

The term "cloud" is used as a metaphor for the Internet, based on the cloud drawing used in the past to

represent the telephone network, [24] and later to depict the Internet incomputer network diagrams as

anabstraction of the underlying infrastructure it represents.[25]

Cloud computing is a natural evolution of the widespread adoption ofvirtualisation, service-orientedarchitecture, autonomic, and utility computing. Details are abstracted from end-users, who no longer have

need for expertise in, or control over, the technology infrastructure "in the cloud" that supports them.[26]

The underlying concept of cloud computing dates back to the 1960s, whenJohn McCarthy opined that

"computation may someday be organised as a public utility." 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 scientistHerb Grosch(the
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author ofGrosch's law) postulated that the entire world would operate on dumb terminals powered by about

15 large data centers. [27]

The actual term "cloud" borrows from telephony in that telecommunications companies, who until the 1990s

offered primarily dedicated point-to-point data circuits, began offering Virtual Private Network(VPN)services with comparable quality of service but at a much lower cost. By switching traffic to balance

utilisation as they saw fit, they were able to utilise their overall network bandwidth more effectively. The

cloud symbol was used to denote the demarcation point between that which was the responsibility of the

provider and that which was the responsibility of the user. Cloud computing extends this boundary to cover

servers as well as the network infrastructure.[28]

After thedot-com bubble,Amazonplayed a key role in the development of cloud computing by modernising

theirdata centers, which, like mostcomputer 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" could add new

features faster and more easily, Amazon initiated a new product development effort to provide cloud

computing to external customers, and launchedAmazon Web Service (AWS) on a utility computing basis in

2006.[18][29]

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.[30]

In the same year, efforts were focused on providing QoS 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.[31] 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"[32] and observed that "[o]rganisations are switching from company-

owned hardware and software assets to per-use service-based models" so that the "projected shift to cloud

computing ... will result in dramatic growth in IT products in some areas and significant reductions in other

areas."[33]

[edit]Layers

Once an internet protocol connection is established among several computers, it is possible to share

services within any one of the following layers.
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[edit]Client

See also:Category:Cloud clients

A cloud clientconsists ofcomputer hardware and/orcomputer software that relies on cloud computing for

application delivery and that is in essence useless without it. Examples include some computers

(example:Chromebooks), phones (example: Google Nexusseries) and other devices,operating

systems(example:Google Chrome OS), andbrowsers.[34][35][36]

[edit]Application

See also:Category:Cloud applications

Cloud application services or "Software as a Service (SaaS)" deliver software as a service over the

Internet, eliminating the need to install and run the application on the customer's own computers and

simplifying maintenance and support.

A cloud application is software provided as a service. It consists of the following: a package of interrelated

tasks, the definition of these tasks, and the configuration files, which contain dynamic information about

tasks at run-time. Cloud tasks provide compute, storage, communication and management capabilities.

Tasks can be cloned into multiple virtual machines, and are accessible through application programmable

interfaces (API). Cloud applications are a kind ofutility computing that can scale out and in to match the

workload demand. Cloud applications have a pricing model that is based on different compute and storage

usage, and tenancy metrics.[37]

What makes a cloud application different from other applications is its elasticity. Cloud applications have

the ability to scale out and in. This can be achieved by cloning tasks in to multiple virtual machinesat run-

time to meet the changing work demand. Configuration Data is where dynamic aspects of cloud application

are determined at run-time. There is no need to stop the running application or redeploy it in order to

modify or change the information in this file.[38]
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SOA is an umbrella that describes any kind ofservice. A cloud application is a service. A cloud

application meta-modelis a SOA model that conforms to the SOA meta-model. This makes cloud

applications SOA applications. However, SOA applications are not necessary cloud applications. A cloud

application is a SOA application that runs under a specific environment, which is the cloud computing

environment (platform). This environment is characterized by horizontal scalability, rapid provisioning, ease

of access, and flexible prices. While SOA is a business model that addresses the business process

management, cloud architecture addresses many technical details that are environment specific, which

makes it more a technical model.[37]

[edit]Platform

See also:Category:Cloud platforms

Cloud platform services, also known asplatform as a service (PaaS), deliver a computing

platformand/orsolution stack as a service, often consuming cloud infrastructure and sustaining cloud

applications.[39] It facilitates deployment of applications without the cost and complexity of buying and

managing the underlying hardware and software layers.[40][41]Cloud computing is becoming a major change

in our industry, and one of the most important parts of this change is the shift of cloud platforms. Platforms

let developers write certain applications that can run in the cloud, or even use services provided by the

cloud. There are different names being used for platforms which can include the on-demand platform, or

Cloud 9. Regardless of the nomenclature, they all have great potential in developing, and when

development teams create applications for the cloud, each must build its own cloud platform.

[edit]Infrastructure

See also:Category:Cloud infrastructure

Cloud infrastructure services, also known as "infrastructure as a service" (IaaS), deliver computer

infrastructure typically aplatform virtualization environment as a service, along with raw (block) storage

and networking. Rather than purchasing servers, software, data-center space or network equipment, clients

instead buy those resources as a fully outsourced service. Suppliers typically bill such services on a utility

computing basis; the amount of resources consumed (and therefore the cost) will typically reflect the level

of activity.[42]

[edit]Server

The servers layer consists ofcomputer hardwareand/orcomputer software products that are specifically

designed for the delivery of cloud services, including multi-core processors, cloud-specific operating

systems and combined offerings. [43][44][45][46]
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[edit]Deployment models

Cloud computing types

[edit]Public cloud

A public cloud is one based on the standard cloud computing model, in which a service provider makes

resources, such as applications and storage, available to the general public over the Internet. Public cloud

services may be free or offered on a pay-per-usage model.[16]

[edit]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.[47]

[edit]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. It can also be defined

as multiple cloud systems that are connected in a way that allows programs and data to be moved easily

from one deployment system to another.[47]

[edit]Private cloud

Private cloud is infrastructure operated solely for a single organization, whether managed internally or by a

third-party and hosted internally or externally.[47]

They have attracted criticism because users "still have to buy, build, and manage them" and thus do not

benefit from less hands-on management, [48] essentially "[lacking] the economic model that makes cloud

computing such an intriguing concept". [49][50]
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[edit]Architecture

Cloud computing sample architecture

Cloud architecture,[51] thesystems architecture of thesoftware systems involved in the delivery of cloud

computing, typically involves multiple cloud components communicating with each other over aloose

couplingmechanism such as a messaging queue.

[edit]The Intercloud

Main article: Intercloud

The Intercloud[52] is an interconnected global "cloud of clouds" [53][54] and an extension of

the Internet "network of networks" on which it is based.[55][56][57]

[edit]Cloud engineering

Cloud engineering is the application ofengineering 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.

[edit]Issues

[edit]Privacy

The cloud model has been criticised by privacy advocates for the greater ease in which the companies

hosting the cloud services control, thus, can monitor at will, lawfully or unlawfully, the communication and

data stored between the user and the host company. Instances such as the secret NSA program, working

withAT&T, andVerizon, which recorded over 10 million phone calls between American citizens, causes

uncertainty among privacy advocates, and the greater powers it gives to telecommunication companies to

monitor user activity.[58]While there have been efforts (such asUS-EU Safe Harbor) to "harmonise" the
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legal environment, providers such asAmazon still cater to major markets (typically the United States and

the European Union) by deploying local infrastructure and allowing customers to select "availability

zones."[59] Cloud computing poses privacy concerns because the service provider at any point in time, may

access the data that is on the cloud. They could accidentally or deliberately alter or even delete some info.

[60]

[edit]Compliance

In order to obtain compliance with regulations including FISMA,HIPAA, andSOX in the United States,

the Data Protection Directive in theEU and the credit card industry's PCI DSS, users may have to

adopt communityorhybriddeployment modes that are typically more expensive and may offer restricted

benefits. This is how Googleis able to "manage and meet additional government policy requirements

beyond FISMA"[61][62] and Rackspace Cloudor QubeSpace are able to claim PCI compliance.[63]

Many providers also obtainSAS 70 Type II certification, 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. [64]Providers typically make this information available on request, undernon-disclosure

agreement.[65][66]

Customers in the EU contracting with cloud providers established outside the EU/EEA have to adhere to

the EU regulations on export of personal data.[67]

[edit]Legal

As can be expected with any revolutionary change in the landscape of global computing, certain legalissues arise; everything from trademark infringement, security concerns to the sharing of propriety data

resources.

[edit]Open source

See also:Category:Free software for cloud computing

Open-source softwarehas provided the foundation for many cloud computing implementations, one

prominent example being the Hadoop framework.[68]In November 2007, theFree Software

Foundationreleased theAffero General Public License, a version ofGPLv3intended to close a

perceived legal loopholeassociated with free software designed to be run over a network.[69]

[edit]Open standards

See also:Category:Cloud standards

Most cloud providers exposeAPIs that are typically well-documented (often under a Creative

Commonslicense[70]) 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.[71]
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[edit]Security

Main article: Cloud computing 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 differ

widely from those of traditional architectures.[72]

The relative security of cloud computing services is a contentious issue that may be delaying its adoption.

[73]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.[74]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.[72][75][76]

[edit]Sustainability

Although cloud computing is often assumed to be a form of "green computing", there is as of yet no

published study to substantiate this assumption.[77] Siting the servers affects 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,[78]Sweden and Switzerland,[79]are

trying to attract cloud computing data centers. Energy efficiency in cloud computing can result from energy-

aware scheduling and server consolidation.[80]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.[81]

[edit]

Abuse

As with privately purchased hardware, crackers posing as legitimate customers can purchase the services

of cloud computing for nefarious purposes. This includes password cracking and launching attacks using

the purchased services.[82]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
http://en.wikipedia.org/w/index.php?title=Cloud_computing&action=edit&section=24http://en.wikipedia.org/w/index.php?title=Cloud_computing&action=edit&section=24http://en.wikipedia.org/wiki/Cloud_computing_securityhttp://en.wikipedia.org/wiki/Cloud_computing#cite_note-Zissis_10-71http://en.wikipedia.org/wiki/Cloud_computing#cite_note-72http://en.wikipedia.org/wiki/Cloud_computing#cite_note-72http://en.wikipedia.org/wiki/Cloud_computing#cite_note-73http://en.wikipedia.org/wiki/Cloud_computing#cite_note-73http://en.wikipedia.org/wiki/Cloud_computing#cite_note-Zissis_10-71http://en.wikipedia.org/wiki/Cloud_computing#cite_note-Zissis_10-71http://en.wikipedia.org/wiki/Cloud_computing#cite_note-74http://en.wikipedia.org/wiki/Cloud_computing#cite_note-75http://en.wikipedia.org/w/index.php?title=Cloud_computing&action=edit&section=25http://en.wikipedia.org/w/index.php?title=Cloud_computing&action=edit&section=25http://en.wikipedia.org/wiki/Green_computinghttp://en.wikipedia.org/wiki/Cloud_computing#cite_note-76http://en.wikipedia.org/wiki/Cloud_computing#cite_note-77http://en.wikipedia.org/wiki/Cloud_computing#cite_note-77http://en.wikipedia.org/wiki/Cloud_computing#cite_note-78http://en.wikipedia.org/wiki/Cloud_computing#cite_note-78http://en.wikipedia.org/wiki/Cloud_computing#cite_note-79http://en.wikipedia.org/wiki/Cloud_computing#cite_note-79http://en.wikipedia.org/wiki/Cloud_computing#cite_note-80http://en.wikipedia.org/wiki/Cloud_computing#cite_note-80http://en.wikipedia.org/w/index.php?title=Cloud_computing&action=edit&section=26http://en.wikipedia.org/w/index.php?title=Cloud_computing&action=edit&section=26http://en.wikipedia.org/wiki/Cloud_computing#cite_note-81http://en.wikipedia.org/wiki/Cloud_computing#cite_note-81http://en.wikipedia.org/wiki/Trojan_horse_(computing)http://en.wikipedia.org/w/index.php?title=Cloud_computing&action=edit&section=24http://en.wikipedia.org/wiki/Cloud_computing_securityhttp://en.wikipedia.org/wiki/Cloud_computing#cite_note-Zissis_10-71http://en.wikipedia.org/wiki/Cloud_computing#cite_note-72http://en.wikipedia.org/wiki/Cloud_computing#cite_note-73http://en.wikipedia.org/wiki/Cloud_computing#cite_note-Zissis_10-71http://en.wikipedia.org/wiki/Cloud_computing#cite_note-74http://en.wikipedia.org/wiki/Cloud_computing#cite_note-75http://en.wikipedia.org/w/index.php?title=Cloud_computing&action=edit&section=25http://en.wikipedia.org/wiki/Green_computinghttp://en.wikipedia.org/wiki/Cloud_computing#cite_note-76http://en.wikipedia.org/wiki/Cloud_computing#cite_note-77http://en.wikipedia.org/wiki/Cloud_computing#cite_note-78http://en.wikipedia.org/wiki/Cloud_computing#cite_note-79http://en.wikipedia.org/wiki/Cloud_computing#cite_note-80http://en.wikipedia.org/w/index.php?title=Cloud_computing&action=edit&section=26http://en.wikipedia.org/wiki/Cloud_computing#cite_note-81http://en.wikipedia.org/wiki/Trojan_horse_(computing)

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