摘要
共识算法是区块链的核心。为解决基于算力的共识算法存在的安全问题,一般采用基于历史行为的信任值代替算力,但该方法只根据特定的行为决定每个节点的信任值,太过于简单,不适用于复杂的应用场景。因此提出了一种基于可信性评估的区块链共识机制,利用区块链节点在整个区块链上的工作表现产生的信任值,来定义节点的力量,信任值由信任值评估算法产生,在算力和时间方面增加攻击成本。经过对提出的共识机制的性能测试和安全性分析,表明本文中的共识机制对于基于算力的攻击成本远超于其他共识算法。
Consensus algorithm was the core technology of block chain.A method was proposed that the trust value based on historical behavior,not the consensus algorithm of arithmetic,was used to solve the security problem of consensus algorithm based on arithmetic.But the method was too simple to satisfy complex application scenarios.A consensus mechanism based on credibility assessment was proposed.The strength of the node was defined by the trust value determined by its performance on the whole blockchain.The trust value was generated by the trust value evaluation algorithm.The algorithm increased the attack cost in terms of computational power and time.The performance test and security analysis of the proposed consensus mechanism showed that the attack cost of the consensus mechanism was much higher than that of other consensus algorithms.
作者
王冠
张文月
WANG Guan;ZHANG Wenyue(Faculty of Information Technology, Beijing University of Technology, Beijing 100124, China;Beijing Key Laboratory of Trusted Computing, Beijing100124, China)
出处
《郑州大学学报（理学版）》
CAS
北大核心
2020年第3期27-33,共7页
Journal of Zhengzhou University:Natural Science Edition
关键词
可信性评估
信任值
共识组
算力攻击
credibility evaluation
trusted value
consensus group
arithmetic attack
作者简介
王冠(1968—),男,山西霍州人,副教授,主要从事信息安全、可信计算研究,E-mail:wangguan@bjut.edu.cn。
