Research on access control method of Digital Archives based on blockchain

Abstract

This paper analyzes the security problems that need to be solved urgently in digital archives system: First, the centralized storage of digital archives makes it overwhelmingly dependent on the third-party storage organization. Second, every transaction has its own access proof and its own authorization proof, it's not transparent to others. Then the blockchain technology is introduced to solve the existing problems. We store the digital file attachment and file attributes in the private IPFS cluster after encryption. The address of IPFS and digital fingerprint of the file are stored on the private blockchain. Additionally, this paper stores and checks the height and hash value of the latest irreversible block of the private blockchain, to guarantee the authenticity of data on private blockchain. To solve the second problem, we store the ABAC on public blockchain, add time and position information to the attributes of the subject, to achieve fine-grained access control. Finally, this model is implemented on fabric1.0.3.