Netinfo Security ›› 2023, Vol. 23 ›› Issue (7): 44-52.doi: 10.3969/j.issn.1671-1122.2023.07.005

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Attribute-Based Anti-Quantum Threshold Ring Signcryption Scheme for Blockchain-Based Finance

YU Huifang1(), QIAO Yifan1, MENG Ru2   

  1. 1. School of Cyberspace Security, Xi’an University of Posts & Telecommunications, Xi’an 710121, China
    2. School of Cyberspace Security, Jinan University, Guangzhou 510632, China
  • Received:2023-03-27 Online:2023-07-10 Published:2023-07-14

Abstract:

To solve the problems of coarse granularity of user access control, uncontrolled flow of transaction data, and vulnerability to eavesdropping of transmission data in public chain in blockchain finance systems, this paper proposed an attribute-based anti-quantum threshold ring signcryption Scheme for blockchain-based finance (BCF-AAQTRSC). BCF-AAQTRSC improves the flexibility of blockchain access control and protects the security of blockchain access control because multi-attribute mechanism can make any user create the attributes and authorize different users. BCF-AAQTRSC satisfies the confidentiality, unforgeability, anonymity and anti-quantum security while achieving the decentralization. NTRU lattice is used to construct the system parameters, master key and user private key, BCF-AAQTRSC uses the message block sharing technology and pad-permutation technology to construct the ciphertext, so its security and computation efficiency are greatly improved. BCF-AAQTRSC is suitable for blockchain-based finance application scenarios with high distribution storage efficiency.

Key words: lattice-based cryptography, consortium blockchain, threshold ring signcryption, message block sharing, privacy protection

CLC Number: