一种基于联盟链的兼具授权监管与隐私保护方案  

Privacy Protection and Authorization Supervision Scheme Based on Consortium Chain

作　　者：霍鑫磊 龙宇[1] 谷大武[1,2] HUO Xin-lei;LONG Yu;GU Da-wu(School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;School of Cyber Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学计算机科学与工程系,上海200240 [2]上海交通大学网络空间安全学院,上海200240

出　　处：《小型微型计算机系统》2023年第3期589-595,共7页Journal of Chinese Computer Systems

基　　金：2021年度山东省重点研发计划(重大科技创新工程)项目(2021CXGC010105)资助;上海市2019年度“科技创新行动计划”项目(19511101403)资助;2020“教育部科学技术研究重点(重大)项目”(2020KJ010201)资助。

摘　　要：区块链技术为推动金融等领域的数据互联互通提供强大助推力.然而现有区块链研究中仍存在隐私泄露和监管缺失等问题,区块链隐私保护特性及其与监管科技的融合有利于加速区块链应用落地.本文在联盟链场景下提出了一种兼具授权监管与隐私保护的方案.一方面,方案在可确保交易正确性的前提下,实现了交易金额和交易者身份地址对交易无关节点的隐私性;另一方面,授权监管方可对任意交易执行审计并对存在违规消息的区块进行修订.总之,通过对联盟链下成员角色划分及变色龙哈希函数、零知识证明等密码技术,实现了对交易隐私性的全面保障和细粒度的强制监管.Blockchain technology can provide a powerful boost to finance, medicine, and other data interconnection fields.As the saying goes, opportunity comes along with the challenge.There are still issues such as privacy leakage and lack of supervision in existing blockchain research.Accordingly, the research on the characteristics of blockchain privacy protection and its integration with regulatory technology is an urgent need for the implementation of blockchain applications.The application scenario of that scheme is consortium chain.On the one hand, under the premise of ensuring the correctness of the transaction, the scheme realized that the privacy of the transaction amount and the recipient′s address in the transaction process to the other nodes except transaction parties and the authorized supervisor;On the other hand, the authorized supervisor can revise the block, which contains violation messages.Concretely speaking, the scheme uses the chameleon hash function instead of the traditional hash function to calculate the block hash, and the authorized supervisor can use the chameleon hash trapdoor key to ensure that the changed target block is not affecting the link status of other blocks.Compared to the state-of-the-art researches, we introduce more fine grained enforced supervision mechanism besides keeping all the privacy properties of Blockchain.

关 键 词：区块链 联盟链 隐私保护 可监管 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]