Abstract: Cloud storage has become very popular now a days because of its advantages like sharing of data among different geographical locations .But in most of the organizations, the cache can contain many duplicate copies of many pieces of same data. Many techniques being used for removing duplicate copies of repeating data, among these techniques one of the important data compression technique is data deduplication. Deduplication is widely used in cloud storage to save bandwidth and to reduce the amount of storage space. To protect the confidentiality of data along with deduplication convergent encryption technique is used before outsourcing. To effectively protect data security, this paper makes the first attempt to formally address the problem of authorized data deduplication.
Keywords: Deduplication, hybrid cloud, authorized duplicate check, convergent encryption, symmetric encryption.