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Distributed Random Beacon for Blockchain Based on Share Recovery Threshold Signature
Yan Zhu1, Bingyu Li1, Yang Yang1
1School of Cyber Science and Technology, Beihang University, Beijing 100191, China.
Sensors (Basel, Switzerland)
|August 26, 2022
Summary
This study introduces a new threshold signature scheme for blockchains to secure random number generation. It enables fast recovery of key shares after attacks, ensuring continued security and reliability.
Area of Science:
- Cryptography
- Blockchain Technology
- Distributed Systems
Background:
- Distributed random beacons are essential for blockchain security.
- Blockchain nodes are vulnerable to attacks that reduce participants in random number generation.
- Attacks compromise the security of generated random numbers.
Purpose of the Study:
- To design a secure threshold signature scheme for blockchains.
- To ensure fast recovery of capabilities after adversary reboot attacks.
- To maintain the security of random number generation.
Main Methods:
- Developed a threshold signature scheme based on share recovery.
- Utilized a bivariate polynomial during distributed key generation.
- Implemented a consistent threshold for both signing and recovery.
Main Results:
- The scheme preserves threshold signature key shares.
- Participants can recover lost key shares efficiently.
- Acceptable time overhead was observed during distributed key generation.
Conclusions:
- The proposed scheme enhances the security of threshold signature-based random number generation.
- Share recovery functionality is effectively integrated.
- The system guarantees fast recovery and continued security post-attack.
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