Cloud Computing is transforming information technology. As information and processes are migrating to the cloud, it is transforming not only where computing is done, but also fundamentally, how it is done. As increasingly more corporate and academic worlds invest in this technology, it will also drastically change IT professionals' working environment. Cloud Computing solves many problems of conventional computing, including handling peak loads, installing software updates, and, using excess computing cycles. However, the new technology has also created new challenges such as data security, data ow nership and trans-code data storage. In this paper we have discussed about cloud computing security issues, mechanism, challenges that cloud service provider face during cloud engineering and presented the metaphoric study of various security algorithms
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