Distributed Random Beacon for Blockchain Based on Share Recovery Threshold Signature

【Author】 Zhu, Yan; Li, Bingyu; Yang, Yang; Ding, Zhenyang; Zheng, Haibing; He, Guangyu; Hou, Shengjie

【Source】SENSORS

【影响因子】3.847

【Abstract】Random beacons play a crucial role in blockchains. Most random beacons in a blockchain are performed in a distributed approach to secure the generation of random numbers. However, blockchain nodes are in an open environment and are vulnerable to adversary reboot attacks. After such an attack, the number of members involved in a random number generation decreases. The random numbers generated by the system become insecure. To solve this problem while guaranteeing fast recovery of capabilities, we designed a threshold signature scheme based on share recovery. A bivariate polynomial was generated among the participants in the distributed key generation phase. While preserving the threshold signature key share, it can also help participants who lost their shares to recover. The same threshold setting for signing and recovery guarantees the security of the system. The results of our scheme show that we take an acceptable time overhead in distributed key generation and simultaneously enrich the share recovery functionality for the threshold signature-based random number generation scheme.

【Keywords】random beacon; blockchain; bivariate polynomial; threshold signature; share recovery

【发表时间】2022 AUG

【收录时间】2022-09-06

【文献类型】理论模型

【主题类别】

区块链技术-核心技术-加密算法