Privacy Protection Scheme of Consortium Blockchain Based on Group Signature and Homomorphic Encryption

doi:10.3969/j.issn.1671-1122.2023.03.006

Abstract

Abstract:

In order to solve the problem of user’s identity privacy exposure in the consortium blockchain application, this paper proposed a consortium blockchain privacy protection scheme based on group signature and homomorphic encryption, which improved the single group administrator mechanism in the group signature based on the secret sharing algorithm and set multiple group administrators to keep the group private key together. Based on the homomorphic encryption algorithm, multiple group administrators worked together to generate member private keys that were known only to group members. Through comparison and analysis with existing schemes, this scheme has strong anonymity, anti-forgery, and can effectively resist the active trapping attack of group administrators. Finally, simulation experiments show that the time overhead of this scheme is within the acceptable range.

Key words: consortium blockchain, group signature, secret sharing, homomorphic encryption, privacy protection

CLC Number:

TP309

ZHANG Xuewang, ZHANG Hao, YAO Yaning, FU Jiali. Privacy Protection Scheme of Consortium Blockchain Based on Group Signature and Homomorphic Encryption[J]. Netinfo Security, 2023, 23(3): 56-61.

Figures/Tables 3

References 22

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方案	管理员数量	区块链类型	不可伪造性	高可用性
文献[20]方案	单	—	良	良
文献[21]方案	单	联盟链	良	良
文献[22]方案	单	公链、联盟链	优	良
本文方案	多	联盟链	优	优