Secure and Efficient Client-Side Data Deduplication with Public Auditing in Cloud Storage

Qianlong Dang ； Hua Ma ； Zhenhua Liu ； Ying Xie

《International Journal of Network Security》 22卷3期 (2020/05) Pp. 462-475

https://doi.org/10.6633/IJNS.202005_22(3).12

摘要

In this paper, we propose a secure and efficient client-side data deduplication scheme with public auditing. In the process of deduplication, the proposed scheme improves the probability that the cloud server detects the missing blocks by eliminating the aggregated proofs structure. Meanwhile, we combine the oblivious pseudo-random function protocol with proxy re-encryption technology to implement key distribution without online data owners or the authorized party. Moreover, during public auditing, proxy re-signature technology is utilized to require only one auditing tag for each data block. For data deduplication, the proposed scheme is a zero-knowledge proof of knowledge assuming that the Discrete Logarithm (DL) problem is hard. In addition, the symmetric key can not be recovered by the cloud server or malicious users. And security analysis indicates that our scheme is secure against adaptive chosen-message attack under the Computational Di e-Hellman (CDH) assumption during public auditing. Finally, the performance evaluation demonstrates that the proposed scheme is practical and efficient.

關鍵字

Cloud Storage ； Key Distribution ； Proof of Ownership ； Public Auditing ； Secure Deduplication