Privacy Protection Scheme of Personal Credit Based on Smart Contract in Blockchain

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.