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telugu aunty boothu kathalu, telugu boothu kathalu, telugu aunty boothu kathalu, kamapisachi telugu boothu kathalu, exbii telugu boothu kathalu, newboard telugu boothu kathalu, tappevaridi telugu boothu kathalu, hansika telugu boothu kathalu, telugu boothu kathalu youtube, telugu boothu kathalu archana. There is as yet no single, commonly-agreed definition of "cloud computing". The United States National Institute of Standards and Technology has defined it as follows "Cloud computing is a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction." Under this definition, the cloud model promotes availability and is composed of five essential characteristics, three delivery models and four deployment models. The five key characteristics of cloud computing are on-demand self service, ubiquitous network access, location-independent resource pooling, rapid elasticity and measured service, all of which are geared towards seamless and transparent cloud use. Rapid elasticity enables the scaling up (or down) of resources. Measured services are primarily derived from business model properties whereby cloud service providers control and optimize the use of computing resources through automated resource allocation, load balancing and metering tools. The three cloud service delivery models (see figure 1) are: Application/Software as a Service (SaaS),Platform as a Service (PaaS) and Infrastructure as a Service (IaaS). ITU Technology Watch published a separate report on the cloud computing phenomenon in March 2009 [15]. These three classic cloud service models have different divisions of responsibility with respect to personal data protection. The risks and benefits associated with each model will also differ, and need to be determined on a case-by-case basis and in relation to the nature of the cloud services in question. SaaS enables the consumer to use the provider’s applications running on a cloud infrastructure. The applications are accessible from various client devices through a client interface such as a web browser (e.g. web-based email such as Gmail or CRM from Salesforce). With the SaaS model, the consumer has little or no influence how input data is processed, but should be able to have confidence in the cloud provider’s responsibility and compliance or can control which input he gives to a SaaS. First of all he can avoid to give sensible data to a SaaS. Secondly he might be able to "secure" the sensible data before he inputs them into the SaaS (e.g. their exists plugins for browsers supporting encryption of input form fields. This could be used to send only encrypted mails using Gmail). PaaS provides tools, supported by a cloud provider, that enable developers to deploy applications (e.g. Salesforce's Force.com, Google App Engine, Mozilla Bespin, Zoho Creator). On the one hand, a big responsibility lies with the developer to use best practices and privacy-friendly tools. On the other hand the developer has to rely on the trustworthiness of the underlying PaaS (and related infrastructure). Assume for instance that some developer has developed a cloud application which encrypts all data before it is stored within the cloud storage provided by the PaaS. In this case the developer has to trust that the platform/infrastructure is not compromised. Otherwise the attacker might get access to the clear text (i.e. before encryption happens) – because he can control the execution environment (e.g. virtual machine monitor, hardware etc.). IaaS provides the consumer with computing resources to run software. One example of IaaS is Amazon EC2 Web Services. An IaaS provider will typically take responsibility for securing the data centres, network and systems, and will take steps to ensure that its employees and operational procedures comply with applicable laws and regulations. However, since an IaaS provider may have little application-level knowledge, it will be difficult for that provider to ensure data-level compliance, such as geographic restriction of data transfers. In this case, the responsibility lies with the cloud user to maintain compliance controls. IaaS is the model that guarantees more direct control but also leaves the customer responsible for the implementation of technical and procedural security and resilience measures [6]. With respect to standardization there.

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