Improvement in Homomorphic Encryption to Increase Cloud Security

Cloud computing provide different services to user. But there is 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. To solve the problem of Key management, Key Sharing various schemes have been proposed. The paper will work on designing new modal for key sharing and key management in fully Homomorphic Encryption scheme. In this we use the symmetric key agreement algorithm named Diffie Hellman and HMAC for the data integrity OTP(One Time Password) which provides more security. Due to this the problem of managing the key is removed and data is more secured. Keywords— Cloud, Security, Encryption, Key, OTP, Homomorphic