Abstract: Data deduplication is one of important data compression techniques for eliminating duplicate copies of repeating data, and has been widely used in cloud storage to reduce the amount of storage space and save bandwidth. As the numbers of files are increasing the condition of storage node canít be managed. Because of high volume of files, it results in wasted hardware resources, increased control complexity of data center and less efficient storage system. Many systems are existed in the market regarding secure authorized deduplication like symmetric algorithm, Farsite distributed file system, digital fingerprint and message locked encryption. So to overcome this above flaws our proposed system put forwards an idea of secure authorized deduplication by using data hash key, bloom filter, subset vector creation and reverse circle cipher.

Keywords: Data hash key, bloom filter, subset vector creation, reverse circle cipher.