Abstract:
Abstract: In order to reduce the main system access cost of user identity authentication schemes and improve the security and efficiency of system user identity authentication， a user identity authentication scheme based on blockchain bilinear mapping arbitration identity-based signature （IBS） is proposed. Firstly， a user identity authentication architecture is established using the consortium chain， which includes blockchain， registration server， users， and existing systems. Fuzzy extractors are used to use biometric features for identity authentication， and a user identity unified authentication compatibility model is constructed by combining heterogeneous user digital identities on the chain. Secondly， bilinear mapping is introduced to propose an identity based signature algorithm based on identification， which incorporates an arbitration module to extend the security function of the original algorithm and makes it here a revocation function to enhance system security. Finally， based on the blockchain user identity authentication architecture， process design is carried out for the three modules of system user identity registration， cross domain identity authentication， and intra domain identity authentication. The experimental results show that the algorithm proposed in this paper outperforms the selected comparative algorithms in terms of throughput， latency， and resource overhead， indicating that the proposed algorithm can more effectively improve the security and efficiency of system user identity authentication.

Key words: Key words: blockchain, user identity authentication, bilinear mapping, arbitration, identity based signature, fuzzy extractor