Enhancement in Homomorphic Encryption Scheme for Cloud Data Security

Cloud computing is a technology or distributed network where user can move their data and any application software on it. But there are some issues in cloud computing, the main one is security because every user store their useful data on the network so they want their data should be protected from any unauthorized access, any changes that is not done on user´s behalf. There are different encryption techniques used for security purpose like FDE and FHE. To solve the problem of Key management, Key sharing various schemes have been proposed like third party auditing scheme but it will be failed, if the third party´s security is compromised or if the third party is malicious. In this paper, we have used the symmetric key agreement algorithm named Diffie Hellman, it is key exchange algorithm which creates session key between two parties who want to communicate with each other and HMAC for the data integrity and OTP (One Time Password) is created which provides more security.