Representative Ring Signature Algorithm Based on Smart Contract.

Area of Science:

• Blockchain Technology
• Cryptography
• Distributed Systems

Background:

• Traditional ring signature algorithms face challenges with large data sizes and slow performance in collective signing scenarios.
• Existing methods may lack robust privacy protection during multi-party interactions on consortium chains.

Purpose of the Study:

• To propose a novel ring signature algorithm leveraging smart contracts for enhanced collective signing on consortium blockchains.
• To improve signature data capacity, speed, and privacy protection in distributed transaction verification.

Main Methods:

• Developed a representative ring signature algorithm utilizing smart contracts for process organization.
• Employed multiparty secure computation to collect signatory opinions, ensuring privacy during data interaction.
• Implemented the algorithm on the Hyperledger Fabric framework for experimental testing.

Main Results:

• The proposed method demonstrated a reduction in signature volume by over two times compared to the ECC ring signature scheme in worst-case scenarios.
• Signature and verification speeds increased by more than three times.
• The smart contract-based approach effectively prevented signature forgery through a "one encryption per signature" strategy.

Conclusions:

• The novel smart contract-based ring signature algorithm is innovative and practical for collective signature scenarios in consortium chains.
• The method offers significant improvements in efficiency and security over traditional approaches.
• This technique enhances privacy protection and prevents signature forgery in distributed environments.