Abstract: Cloud computing as the necessity of the ever-increasing volume of data and its storage, comes with the critical challenge of managing this large amount of data with scalability. A data compression technique called deduplication is used for eliminating the redundant data by deleting the duplicate copies so as to save the cloud space. Apart from data compression, we are also applying the security aspects using convergent encryption with some additional concepts viz., cryptographic tuning and domain separation. Maintaining the authorized access for the user’s confidential data, the concept called ‘Proof of Ownership’ is used for recognizing the respective user along with his access privilege.

Keywords: secure deduplication, convergent encryption, cryptographic tuning, domain separation.