Anti-Leakage Client-Side Deduplication with Ownership Management in Fog Computing

Hua Ma ； Guo-Hua Tian ； Lin-Chao Zhang

《International Journal of Network Security》 22卷1期 (2020/01) Pp. 24-35

https://doi.org/10.6633/IJNS.202001_22(1).03

摘要

In commercial fog computing, block-level client-side deduplication (BC-Dedu) can be used to save storage space and network bandwidth. However, the existing BC-Dedu schemes cannot support ownership management, which leads to the degradation of forward and backward secrecy of the outsourced data. Besides, BC-Dedu schemes are vulnerable to the side information leakage issue since the existence of data is revealed to the outside adversary. In this paper, we propose an anti-leakage BC-Dedu scheme that supports ownership management in fog computing. Specifically, we present a dual-level ownership list and key update mechanism to achieve ownership management in the proposed scheme. Besides, we construct a novel deduplication protocol to alleviate the side information leakage issue. Furthermore, a dynamic data storage strategy is proposed to reduce service costs and latency. Security and performance analyses demonstrate that the proposed scheme achieves the desired security requirements while saving resource efficiently.

關鍵字

Deduplication ； Dynamic Data Storage ； Fog Computing ； Ownership Management