To analyze the impact of solar eclipse attacks on the block-chain network and comprehensively and accurately evaluate the security of the current system,a method based on the Markov differential is proposed to solve t...To analyze the impact of solar eclipse attacks on the block-chain network and comprehensively and accurately evaluate the security of the current system,a method based on the Markov differential is proposed to solve the problem that it is difficult to meet the multi-stage continuous real-time randomness in the current block-chain network attack and defense process.Block-chain network security situation awareness method based on game model.This method analyzes the security data generated by the solar eclipse attack,establishes the corresponding attack graph,and classifies the offensive and defensive strengths of the offensive and defensive parties.Through a multi-stage offensive and defensive game,the security level of each node of the blockchain system is combined with the final objective function value comprehensively evaluates the real-time security status of the system.The results of simulation experiments show that the proposed model and algorithm can not only effectively evaluate the overall security of the blockchain network,but also have feasibility in predicting the future security status.展开更多
贡献值证明(proof of contribution value,PoC)在交易中存在通过筹集资金增加交易量、制造虚假贡献值以提高记账权概率的问题.权益证明(proof-of-stake,PoS)面临不活跃节点通过长期持有权益累积币龄,增加成为出块节点可能性的问题.为解...贡献值证明(proof of contribution value,PoC)在交易中存在通过筹集资金增加交易量、制造虚假贡献值以提高记账权概率的问题.权益证明(proof-of-stake,PoS)面临不活跃节点通过长期持有权益累积币龄,增加成为出块节点可能性的问题.为解决这些问题,提出混合共识机制PoCaS.该机制首先引入亲密度概念,结合贡献值计算声誉贡献值,以识别虚假贡献值.其次,按声誉贡献值降序排序,根据斐波那契数列分组得到活跃指数.最后,综合权益值和活跃指数设定挖矿难度,各节点通过工作量证明(proof-of-work,PoW)竞争出块.实验显示,PoCaS可使虚假贡献值节点出块率降低80%,币龄累计节点获得记账权次数减少89%,并提升节点积极性.展开更多
结合综合能源系统的互联互动特征及减碳潜力,以区块链能源交易平台为载体,从绿证、碳交易及需求响应等多市场联动入手,提出了基于能源碳通证交互机制的综合能源市场减排价值计量与交易策略。首先,构建了包含多能源供给、多能源负荷、多...结合综合能源系统的互联互动特征及减碳潜力,以区块链能源交易平台为载体,从绿证、碳交易及需求响应等多市场联动入手,提出了基于能源碳通证交互机制的综合能源市场减排价值计量与交易策略。首先,构建了包含多能源供给、多能源负荷、多能源储能及电-气耦合设备的综合能源系统(integrated energy system,IES)拓扑结构及全流程碳排放模型;其次,设计了综合能源市场各类减碳交易及碳消除技术的减排价值计量模型;然后,创建了以减碳量为核心概念的能源碳通证,借助区块链技术的智能合约、共识机制等内容,通过超级账本的Fabric网络搭建了EC-Token交易平台,通过对IES的低碳技术及绿色行动进行“量化”激发市场活力。最后,采用某典型IES进行数值仿真,结果验证了所提策略的合理性和通证区块链平台的有效性。展开更多
基金supported by Heilongjiang Provincial Natural Science Foundation of China(LH2021F031)。
文摘To analyze the impact of solar eclipse attacks on the block-chain network and comprehensively and accurately evaluate the security of the current system,a method based on the Markov differential is proposed to solve the problem that it is difficult to meet the multi-stage continuous real-time randomness in the current block-chain network attack and defense process.Block-chain network security situation awareness method based on game model.This method analyzes the security data generated by the solar eclipse attack,establishes the corresponding attack graph,and classifies the offensive and defensive strengths of the offensive and defensive parties.Through a multi-stage offensive and defensive game,the security level of each node of the blockchain system is combined with the final objective function value comprehensively evaluates the real-time security status of the system.The results of simulation experiments show that the proposed model and algorithm can not only effectively evaluate the overall security of the blockchain network,but also have feasibility in predicting the future security status.
文摘贡献值证明(proof of contribution value,PoC)在交易中存在通过筹集资金增加交易量、制造虚假贡献值以提高记账权概率的问题.权益证明(proof-of-stake,PoS)面临不活跃节点通过长期持有权益累积币龄,增加成为出块节点可能性的问题.为解决这些问题,提出混合共识机制PoCaS.该机制首先引入亲密度概念,结合贡献值计算声誉贡献值,以识别虚假贡献值.其次,按声誉贡献值降序排序,根据斐波那契数列分组得到活跃指数.最后,综合权益值和活跃指数设定挖矿难度,各节点通过工作量证明(proof-of-work,PoW)竞争出块.实验显示,PoCaS可使虚假贡献值节点出块率降低80%,币龄累计节点获得记账权次数减少89%,并提升节点积极性.
文摘结合综合能源系统的互联互动特征及减碳潜力,以区块链能源交易平台为载体,从绿证、碳交易及需求响应等多市场联动入手,提出了基于能源碳通证交互机制的综合能源市场减排价值计量与交易策略。首先,构建了包含多能源供给、多能源负荷、多能源储能及电-气耦合设备的综合能源系统(integrated energy system,IES)拓扑结构及全流程碳排放模型;其次,设计了综合能源市场各类减碳交易及碳消除技术的减排价值计量模型;然后,创建了以减碳量为核心概念的能源碳通证,借助区块链技术的智能合约、共识机制等内容,通过超级账本的Fabric网络搭建了EC-Token交易平台,通过对IES的低碳技术及绿色行动进行“量化”激发市场活力。最后,采用某典型IES进行数值仿真,结果验证了所提策略的合理性和通证区块链平台的有效性。
