A New Cloud Security Technique using Data Partition and Homomorphic Encryption

ABSTRACT Cloud storage is rapid increasing fact nowadays so cloud data security becomes a more concerned matter at processing stage of data .whenever users want to operate on data stored on un-trusted cloud then it is main concern that their data would be confidential during operation and faster uploading and downloading of data. So in this paper we are using homomorphic encryption which is asymmetric encryption and provides operation on encrypted data giving same result as obtained by operating on plain data. Out of several homomorphic algorithms EcElGamal algorithm has been chosen to encrypt the data which provides high security using less key size and proposes a new approach data partition based EcElGamal. Data Partition refer to dividing the data in blocks of some size in bytes or bits, by this we are reducing load on single server and provides better performance.