In this paper 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. In general, there are many encryption algorithms that can be used to reduce the real time frauds. These encryption algorithms can be classified into two types. Symmetric encryption algorithms are used earlier for the purpose of providing security such as AES and Blowfish algorithms. In order to provide more security the asymmetric algorithms are used such as RSA algorithm and Elliptic Curve Cryptography (ECC) algorithm. When compared to ECC, RSA algorithms is little slow and uses larger key or message in size. So, now the most efficient ECC algorithm came into the picture in order to provide high security over the existing credit frauds. This proves the efficiency and the less memory usage after the implementation of elliptic curve cryptography.
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