Enhanced post-quantum key escrow system for supervised data conflict of interest based on consortium blockchain

Area of Science:

• Blockchain Technology
• Cryptography
• Cybersecurity

Background:

• Consortium blockchains provide privacy but rely on vulnerable traditional encryption.
• Existing key escrow schemes are susceptible to attacks, especially with the advent of quantum computing.

Purpose of the Study:

• To design and implement an enhanced post-quantum key escrow system for consortium blockchains.
• To improve privacy-preserving capabilities and resistance to collusion and single points of failure.

Main Methods:

• Integration of NIST post-quantum public-key encryption/KEM algorithms.
• Development of chaincodes, APIs, and command lines for practical implementation.
• Comprehensive security analysis and performance evaluation.

Main Results:

• A fine-grained, single-point-of-dishonest-resistant, and collusion-proof key escrow solution.
• Detailed performance metrics including chaincode execution time and on-chain storage.
• Evaluation of post-quantum KEM algorithm security and performance on consortium blockchains.

Conclusions:

• The enhanced system offers a secure and private solution for consortium blockchains.
• The integration of post-quantum cryptography is crucial for future blockchain security.
• The study provides practical tools and analysis for implementing quantum-resistant key escrow.