Efficient verification of data possession in cloud computing
Songyang Wu, Yong Zhang · 2016
Cloud computing delegates the management of physical data to the third parties who cannot be trusted fully. This may result in security risks in integrity of outsourcing data, the cloud users are hard to convince that their data which is processed in cloud computational tasks is kept intact. Although identity-based signature has been proven useful within cloud security infrastructures by offering more light weight and flexible key management approaches than traditional PKI does. However, the inherent key escrow problem of identity-based signature is hard to be accepted by cloud users. In this paper, we proposed an identity-based signature with escrow free and ID-protection for Cloud Computing, which can solve the key escrow problem better. The idea behind our solution is to utilize a trusted third party to bind the partial secret and the identity of the user together, which prevents the malicious PKG from impersonating the honest user's identity. Detailed security proofs and comparisons (in terms of computational cost, communication overhead and security properties) show that our proposal is secure and efficient.