Comprehensive Study on Data Security in Cloud Data Store

There are many hot topics related to cloud computing paradigm, and one of these important fields is data security in cloud data storage that aims to make users data more secure and for ensure privacy for users. In this paper we intend to introduced a comprehensive study on security of cloud data store, since there have been little works deals with. The introduced papers here addressed this problem from different views, some deals with encryption algorithm while other researchers made comparisons between different techniques. On the other hand, some papers proposed new technique or made some enhancements on existing ones either depends on statistical or un-statistical encryption algorithms. Till now there are no optimal suggested solutions that solve the security on cloud data store.