Review Paper on Privacy Preservation Techniques in Cloud

In this information world, large amounts of data are collected and analyzed every day. Cloud computing is the most known model for supporting large and complex data. Organizations are moving toward cloud computing for getting benefit of its cost reduction and elasticity features but cloud computing has potential risk and vulnerabilities. One of major problem in moving to cloud computing is its security and privacy concerns.Encryption is standalone problem for the security of data stored on the cloud. So we proposed method which combines the concept of encryption along with data deduplication methodology to enhance the privacy of data over cloud. Data deduplication is a specialized data compression technique for eliminating duplicate copies of repeating data in storage. In turns this technique saves the cost and time associated with redundant accessing and processing of data overhead involve as compared to normal operations.