Efficient and Accountable Oblivious Cloud Storage with Three Servers
Qiumao Ma, Wensheng Zhang · 2019
As the adoption of cloud storage service has been pervasive, more and more attentions have been paid to the related security and privacy risks, among which, data access pattern privacy is an important aspect. Lots of solutions have been proposed, but most are infeasible due to high overheads in communication and storage. In this paper, we propose a new solution to address the limitations by leveraging the moderate storage capacity in the increasingly popular cloud storage gateways and the existence of multiple competing and independent cloud storage servers. Extensive analysis and evaluation have shown that, our proposed system can simultaneously attain the features of provable protection of data access pattern, low data query delay, low server storage overhead, low communication costs, and accountability.