文献类型：期刊文献

中文题名：基于动态授权的信任度证明机制

英文题名：Proof of Trust: Mechanism of Trust Degree Based on Dynamic Authorization

作者：黄建华[1];夏旭[1];李忠诚[1];李建华[1];郑红[1]

机构：[1]华东理工大学信息科学与工程学院

年份：2019

卷号：30

期号：9

起止页码：2593

中文期刊名：软件学报

外文期刊名：Journal of Software

收录：CSTPCD;;EI(收录号：20194707708186);Scopus;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：国家自然科学基金(61472139);国家重点研发计划(2016YFA0502300)~~

语种：中文

中文关键词：区块链;比特币;共识机制;信任证明;信任度

外文关键词：blockchain;bitcoin;consensus mechanism;proof of trust;trust degree

摘要：提出一种基于动态授权的信任证明机制(proof of trust,简称 PoT),并在该机制的基础上修正了现有区块生成策略中存在的诸如权益粉碎攻击和贿赂攻击等问题.PoT 将网络中的节点分为矿工节点和基本权益代表(stakeholder)节点,根据节点参与创建区块的行为赋予其相应的信任度,stakeholder 节点对区块进行签名操作并赋予区块信任度,最终根据区块所获得信任度权重竞争上链.同时,还针对贿赂攻击和常见的权益累积攻击的攻击成本以及系统对于攻击的反应进行了分析.仿真实验的结果表明,PoT 机制在应对权益粉碎攻击、贿赂攻击以及权益累积攻击方面相比于传统权益证明机制有着显著优势.
A trust degree mechanism based on dynamic authorization, proof of trust (PoT), is proposed in this study. Based on the mechanism, problems such as nothing-at-the-stake and bribe attack in the existing block generation strategies are fixed. There are two types of nodes in the network: miners and stakeholders. The trust degree is given according to the behavior of the node participating in the creation of a block. Once a node becomes a stakeholder of the network, it entrusts the block by signing its private key to the block. Finally, the blocks with trust degree compete with each other to be accepted as a legal extension of the blockchain. The cost of attacks against bribe attacks and common stake accumulation attacks, and the system’s response to attacks is also analyzed. Simulation results show that the PoT mechanism can defend more efficiently against nothing-at-the-stake attack, bribe attack, and stake accumulation attack compared to proof of stake.