Blockchain-based accountability for multi-party oblivious RAM

Huikang Cao, Ruixuan Li, Wenlong Tian, Zhiyong Xu, Weijun Xiao

Abstract: Highlights•We summarize the two critical problems in data integrity protection by applying ORAM technology into the cloud storage.•We present a Traceable Oblivious RAM (T-ORAM) with malicious user accountability for multi-user ORAM.•To achieve a high-level secure ORAM system, we further propose a Blockchain-based Traceable Oblivious RAM (BT-ORAM) with a comprehensive accountability scheme.•Experimental results show that T-ORAM has a better performance than existing related solutions, and BT-ORAM can achieve a higher level security than previous work.