A Minimal Disclosure Signature Authentication Scheme Based on Consortium Blockchain

The traditional identity authentication method not only brings single point of failure, but also easily leads to privacy leakage. In order to solve the problem of information leakage caused by identity authentication, this paper proposes a consortium blockchain-based minimal signature authentication scheme MDSA. We use the structure of Merkle Tree to generate digital credentials for users. In particular, this scheme combining zero-knowledge proofs to provide compliance proofs for user identity attribute values to further achieve minimal authentication. We propose an attribute-based authentication model. In general, our scheme allows for self-sovereign identity, secure creation, and distributed storage. We use FISCO BCOS-based blockchain prototype system as our testbed, and the evaluations show that MDSA is feasible and secure, with linear increases in credential generation and authentication overhead.