基于区块链智能合约的个人征信隐私保护方案

doi:10.19678/j.issn.1000-3428.0057140

摘要/Abstract

摘要： 在数字化政府的建设过程中，结合区块链中的智能合约与同态加密技术，提出个人征信隐私保护方案。利用Paillier同态加密算法设置个人征信信息访问的盲读取权限，使得征信访问用户在无法获取个人征信信息明文的情况下，仍可创建自动条件匹配合约并做出合理决策，并且征信系统无法推断出征信访问用户的访问需求，从多角度实现个人征信信息的隐私保护。分析结果表明，该方案在有效保护个人征信隐私的情况下，具有较低的运行成本及较高的安全性。

关键词: 区块链, 智能合约, 征信信息, 隐私保护, 同态加密

Abstract: For the construction of digital government,this paper proposes a privacy protection scheme for personal credit by combining smart contract and homomorphic encryption technology in blockchain.This scheme uses Paillier homomorphic encryption algorithm to set the blind reading permission of personal credit information access,so as to enable credit access users to create an automatic condition matching contract and make reasonable decisions when users cannot obtain the clear text of personal credit information.Under this scheme,the credit system cannot infer the access requirements of credit access users,so the privacy of personal credit information is protected from multiple perspectives.Analysis results show that the proposed scheme can effectively protect personal credit privacy with reduced running overhead and improved security.

Key words: blockchain, smart contract, credit information, privacy protection, homomorphic encryption

中图分类号:

TP393

陈丽燕, 芮廷先, 吕光金. 基于区块链智能合约的个人征信隐私保护方案[J]. 计算机工程, 2020, 46(7): 30-35.

CHEN Liyan, RUI Tingxian, Lü Guangjin. Privacy Protection Scheme of Personal Credit Based on Smart Contract in Blockchain[J]. Computer Engineering, 2020, 46(7): 30-35.

http://www.ecice06.com/CN/Y2020/V46/I7/30

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