HYBRID CLOUD APPROACH WITH SECURITY AND DATA DEDUPLICATION

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. To protect the confidentiality of sensitive data while supporting deduplication, the convergent encryption technique has been proposed to encrypt the data before outsourcing. To better protect data security, this work makes the first attempt to formally address the problem of authorized data deduplication. Different from traditional deduplication systems, the differential privileges of users are further considered in duplicate check besides the data itself. To protect the confidentiality of sensitive data the convergent encryption technique has been used that is, encrypting the data before outsourcing it. In order to support secure and authorized deduplication, differential privileges of the users are considered. For better security this system uses a hybrid cloud architecture, which also supports the authorized duplicate check.