Blending Convergent Encryption and Access Control Scheme for Achieving A Secure and Storage Efficient Cloud

摘要: Conventional encryption schemes are being used over the years for securing outsourced data to cloud. However, this impedes deduplication- ability identify and remove duplicate from storage server. The idea of Convergent Encryption was introduced overcome problem which ensures that identical plaintext files will always produce ciphertexts thus enabling deduplication. Nonetheless, scheme is vulnerable a side-channel attack called “confirmation-of-a-file” its variant “learn-the-remaining-information” breach user privacy by observing deduplication operation. To resolve above two seemingly contrasting issues, we propose blends convergent with traditional access control simultaneously achieving confidentiality Both theoretical security analysis experimental results show our semantically secure resilient against attacks. It incurs minor latency overhead while performing file block level Furthermore, it fine-grained efficiently handling key-management process.