Anonymous identity authentication method, system and product based on group signature and blockchain

Through the anonymous identity authentication method based on group signature and blockchain, the problems of user privacy leakage and insecure data storage in traditional identity authentication are solved, user anonymous verification and data non-tamperability are achieved, and the security and efficiency of the system are improved.

CN118764212BActive Publication Date: 2025-09-23WUHAN UNIV
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Patent Information

Application Number
CN202410917339.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-07-10
Publication Date
2025-09-23
Estimated Expiration
2044-07-10

AI Technical Summary

Technical Problem

Traditional identity authentication carries a high risk of user privacy leakage, centralized storage systems are easily targeted by attacks, and verification information is not stored securely, making it difficult to prevent tampering and regulatory tracking.

Method used

An anonymous identity authentication method based on group signature and blockchain is adopted. By generating group signatures and storing them on the blockchain, anonymous user identity authentication is achieved, and the decentralization and immutability of the blockchain are used to ensure data security.

Benefits of technology

It protects user privacy, reduces the risk of sensitive information leakage, improves the security of data storage and verification efficiency, reduces the workload of management nodes, and ensures the transparency and credibility of the system.

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Abstract

The present invention discloses an anonymous identity authentication method, system and product based on group signature and blockchain. First, the system administrator generates system public parameters and maintains user public keys and identity numbers on the management node. Then the user needs to initiate group member registration to the management node, and the management node issues group member credentials for user verification. Then the user generates a group signature based on the group member credentials, the administrator's public key and the group member's private key, and sends it to the verifier; the verifier calculates and verifies whether the group signature is valid. In addition, the verifier records the corresponding group signature and submits it to the blockchain. Finally, the verifier passes the transaction number of the group signature stored in the blockchain to the management node for the management node to subsequently supervise and track the members who signed the group signature. The present invention adopts group signature technology, has anonymity, and uses the tamper-proof nature of the blockchain to provide strong evidence for the management node to track and supervise users.
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Citation Information

Patent Citations

  • Supervisable transaction privacy protection method based on homomorphic encryption and zero-knowledge proof

    CN116432204A

  • Efficient alliance chain privacy protection method and system based on group signature and Bulletprofs

    CN117714065A