Storage Through Safe Deduplication at Source Side on Cloud Data

Cloud computing is a prevalent data interactive paradigm for processing of large amounts of data and storage without considering the local infrastructure limitations. The advent of cloud storage enables the organizations and enterprises to outsource their data to third party cloud service providers (CSP). Though the services provided by Cloud has many advantages, the users voluntarily give up the physical possession of their outsourced data which inevitably poses new security and privacy risks and yet another challenge is the management of ever increasing volume of data for CSP. In order to deal with these security issues, a new secure storage with deduplication scheme has been adopted. In order to provide security of outsourced data against malicious users and curious CSP's, a new convergent encryption technique is proposed. Every Client encrypts the file before uploading and the encrypted file is input to Hash algorithm which generates a unique identifier for every file. The Client specifies the authorized users and their access rights in a metafile uploaded to the cloud and user can decrypt the downloaded file with his secret key.