Research on Security of Distributed Storage System Based on Blockchain Technology

Abstract

The application of blockchain technology brings more possibilities for the improvement of system security. In this paper, blockchain technology is utilized to strengthen the security of distributed storage system. A multi-tier distributed storage system is constructed by designing the block structure of the transaction blockchain and realizing the two-tier architecture of data management and content storage. All-or-nothing transformation (AONT) method of corrective deletion code is introduced to realize file encryption slicing and data integrity verification to control access rights. Performance validation shows that the write latency of the distributed storage system based on blockchain technology is below 3000ms, and the read response is <30ms. Only 10 out of 1500 sets of data were successfully tampered with. The replica corruption rate is less than 0.2, and the maximum data block corruption rate is not more than 0.056. The node vulnerability expectation is in the range of [0.021,0.431] for the replica corruption rate of the system at node vulnerability expectation of 15-95, and the node load rate fluctuates less than 0.005.