论文标题
基于区块链的匿名加密货币的隐私分析和评估政策
Privacy Analysis and Evaluation Policy of Blockchain-based Anonymous Cryptocurrencies
论文作者
论文摘要
在基于区块链的匿名加密货币中，由于其篡改和透明度特征，交易数据最初是匿名的，借助各种加密技术，例如承诺方案和零知识证明。同样，加密货币与有关软件体系结构和基础安全模型的现有匿名消息协议不同。由于这些差异，必须专门针对匿名加密货币定义匿名感，并且必须根据特定的体系结构模型对每个匿名加密货币中的匿名性进行分析和评估。在本文中，我们首先提出了一个特定的体系结构模型，该模型具有三个软件层的匿名加密货币。接下来，我们介绍了基本隐私属性的定义（Pfitzmann的匿名性，无链接和化名），并全面分析了匿名加密货币每个架构层的每个隐私属性，以建立匿名加密货币的隐私评估策略。最后，我们可以通过隐私评估策略进行公平比较当前领先的匿名加密货币（例如Zerocash，Cryptonote和Mimblewimble）的隐私。
In blockchain-based anonymous cryptocurrencies, due to their tamper-resistance and transparency characteristics, transaction data are initially required to be anonymous, with the help of various cryptographic techniques, e.g., commitment schemes and zero-knowledge proofs. Also, cryptocurrencies are different from existing anonymous messaging protocols regarding the software architecture and the underlying security model. Due to these differences, the sense of anonymity must be specifically defined for anonymous cryptocurrencies, and the anonymity in each anonymous cryptocurrency must be analyzed and evaluated based on the specific architecture model. In this paper, we first propose a specific architecture model with three software layers to anonymous cryptocurrencies. Next, we introduce definitions of fundamental privacy properties (Pfitzmann's anonymity, unlinkability, and pseudonymity) and comprehensively analyze each privacy property for each architecture layer of anonymous cryptocurrencies to establish a privacy evaluation policy for anonymous cryptocurrencies. Finally, we fairly compare the privacy of current leading anonymous cryptocurrencies (e.g., Zerocash, CryptoNote, and Mimblewimble) using the privacy evaluation policy.
