Cloud computing is a way of computing, where most of our data is stored in the cloud, the Internet a computing capability that provides an abstraction between the computing resource and its underlying technical architecture, enabling convenient, on-demand network access to a shared pool of configurable computing resources that can be rapidly provisioned and released with minimal management effort. The goal of cloud computing is to applytraditional supercomputing,or high performance computing power, normally used by military and research facilities, to perform tens of trillions of computations per second, in consumer-orientedapplications such as financial portfolios, to deliver personalized information, to provide data storage or to power large, immersive computer games. To do this, cloud computing uses networks of large groups of servers typically running low-cost consumer PC technology with specialized connections to spread data-processing chores across them. This paper, investigate several cloud computing system providers about their concerns on security and privacy issues.

Cloud computing , cloud computing security , cloud computing methods , architecture, challenges

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