A Trusted Distributed Oracle Scheme Based on Share Recovery Threshold Signature  

作　　者：Shihao Wang Xuehui Du Xiangyu Wu Qiantao Yang Wenjuan Wang Yu Cao Aodi Liu 

机构地区：[1]He’nan Province Key Laboratory of Information Security,Zhengzhou,450000,China [2]School of Cyberspace Security,Zhengzhou University,Zhengzhou,450000,China

出　　处：《Computers, Materials & Continua》2025年第2期3355-3379,共25页计算机、材料和连续体(英文)

基　　金：supported by the National Natural Science Foundation of China(Grant No.62102449);the Central Plains Talent Program under Grant No.224200510003.

摘　　要：With the increasing popularity of blockchain applications, the security of data sources on the blockchain is gradually receiving attention. Providing reliable data for the blockchain safely and efficiently has become a research hotspot, and the security of the oracle responsible for providing reliable data has attracted much attention. The most widely used centralized oracles in blockchain, such as Provable and Town Crier, all rely on a single oracle to obtain data, which suffers from a single point of failure and limits the large-scale development of blockchain. To this end, the distributed oracle scheme is put forward, but the existing distributed oracle schemes such as Chainlink and Augur generally have low execution efficiency and high communication overhead, which leads to their poor applicability. To solve the above problems, this paper proposes a trusted distributed oracle scheme based on a share recovery threshold signature. First, a data verification method of distributed oracles is designed based on threshold signature. By aggregating the signatures of oracles, data from different data sources can be mutually verified, leading to a more efficient data verification and aggregation process. Then, a credibility-based cluster head election algorithm is designed, which reduces the communication overhead by clarifying the function distribution and building a hierarchical structure. Considering the good performance of the BLS threshold signature in large-scale applications, this paper combines it with distributed oracle technology and proposes a BLS threshold signature algorithm that supports share recovery in distributed oracles. The share recovery mechanism enables the proposed scheme to solve the key loss issue, and the setting of the threshold value enables the proposed scheme to complete signature aggregation with only a threshold number of oracles, making the scheme more robust. Finally, experimental results indicate that, by using the threshold signature technology and the cluster head election algorith

关 键 词：Blockchain threshold signature distributed oracle data submission share recovery 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]