交易数据全生命周期区块链隐私保护评估方法

针对区块链与传统信息系统之间的差异，提出一种面向区块链交易数据全生命周期的隐私保护评估方法，从交易数据的发布、共识、存储和应用等方面分析区块链隐私泄露风险和隐私保护方法，建立区块链隐私保护评估指标体系；使用层次分析法与成对比较法相结合的动态指标权重分配方法进行指标相对重要性决策与权重计算；综合隐私保护强度、交易数据可用性和隐私保护技术性能3个维度来计算区块链隐私保护相关能力得分。经分析表明该方法能够实现对区块链隐私保护水平的综合性评估。

Evaluation Method of Blockchain Privacy Protection for Full Life Cycle of Transaction Data

This paper proposes an evaluation method of blockchain privacy protection for full life cycle of transaction data in view of the differences between blockchain and traditional information systems, analyzes blockchain privacy leakage risk and privacy protection methods from aspects of transaction data that are release, consensus, storage, and application to establish a blockchain privacy protection evaluation index system; conduct relative importance decision-making for index, and weight calculation using a dynamic index weight assignment method combining analytic hierarchy process and pairwise comparison; combine three dimensions of privacy protection strength, transaction data usability and privacy protection technical performance to calculate blockchain privacy protection related capability score. The analysis shows that the method enables a comprehensive evaluation of the level of blockchain privacy protection.