区块链隐私保护研究综述

发布时间：2018-08-18 09:08

【摘要】：区块链技术的核心特征是"去中心化"和"去信任化",作为分布式总账技术、智能合约基础平台、分布式新型计算范式,可以有效构建可编程货币、可编程金融和可编程社会,势必将对金融及其他领域带来深远影响,并驱动新一轮技术变革和应用变革.但是区块链技术在提高效率、降低成本、提高数据安全性的同时,也面临严重的隐私泄露问题,得到研究者的广泛关注.将介绍区块链技术架构,定义区块链技术中身份隐私和交易隐私的概念,分析区块链技术在隐私保护方面存在的优势和不足,并分类描述现有研究中针对区块链隐私的攻击方法,例如交易溯源技术和账户聚类技术;然后详细介绍针对区块链网络层、交易层和应用层的隐私保护机制,包括网络层恶意节点检测和限制接入技术、区块链交易层的混币技术、加密技术和限制发布技术,以及针对区块链应用的防御机制;最后,分析了现有区块链隐私保护技术存在的缺陷,展望了未来发展方向.此外,还讨论针对恶意使用区块链技术的监管方法.
[Abstract]:The core features of block chain technology are "decentralization" and "distrust". As distributed general ledger technology, intelligent contract foundation platform, and distributed new computing paradigm, block chain technology can effectively construct programmable currency, programmable finance and programmable society. It is bound to have a profound impact on finance and other areas, and drive a new round of technological and application changes. However, block-chain technology not only improves efficiency, reduces cost and improves data security, but also faces serious privacy disclosure problem, which has been widely concerned by researchers. It will introduce the technical framework of block chain, define the concepts of identity privacy and transaction privacy in block chain technology, and analyze the advantages and disadvantages of block chain technology in privacy protection. And then describes the existing research attacks against block chain privacy, such as transaction traceability technology and account clustering technology, and then introduces the privacy protection mechanism for block chain network layer, transaction layer and application layer in detail. Including network layer malicious node detection and restriction access technology, block chain transaction layer of the mixed coin technology, encryption technology and limited release technology, as well as the defense mechanism for block chain application; finally, The defects of the existing block chain privacy protection technology are analyzed, and the future development is prospected. In addition, regulatory methods for malicious use of block chain technology are also discussed.
【作者单位】：北京理工大学计算机学院;中国政法大学;国家计算机网络应急技术处理协调中心;
【基金】：国家重点研发计划项目(2016YFB0800301) 国家自然科学基金项目(61602039) 北京市自然科学基金项目(4164098)~~
【分类号】：TP309;TP311.13

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