Certificateless Provable Data Possession Scheme With Provable Security in the Standard Model Suitable for Cloud Storage
Lunzhi Deng, Bo Wang, Tao Wang, Shuai Feng, Siwei Li · IEEE Transactions on Services Computing · 2023
Provable data possession (PDP) solves the problem of determining whether the data stored in the cloud is maintained in its entirety. Certificateless cryptography simultaneously tackles two challenges: certificate management and key escrow. There are still three deficiencies in the current known certificateless provable data possession (CL-PDP) schemes. First, security proofs are typically conducted in the random oracle model (ROM). Second, some schemes are incapable of preventing third-party auditor (TPA) from recovering user data blocks. Third, most schemes require hash-to-point operations, which result in lower computational efficiency. In this article, we demonstrated two kinds of attacks targeting the scheme Ji et al. 2020. Subsequently, we put forward a new CL-PDP scheme and showed security proofs in the standard model (SM). Finally, we conducted performance analysis on ten CL-PDP schemes. Our scheme outperforms others in terms of efficiency, as it minimizes computational overhead by requiring only three pairing operations and eliminating the need for hash-to-point operations.