Netinfo Security ›› 2023, Vol. 23 ›› Issue (3): 62-72.doi: 10.3969/j.issn.1671-1122.2023.03.007

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Location Privacy Protection Scheme for Group Signature with Backward Unlinkability

ZHOU Quan1(), ZENG Zhikang1, WANG Kemeng2, CHEN Menglong2   

  1. 1. School of Mathematics and Information Science, Guangzhou University, Guangzhou 510006, China
    2. School of Computer Science and Cyber Engineering, Guangzhou University, Guangzhou 510006, China
  • Received:2022-10-20 Online:2023-03-10 Published:2023-03-14
  • Contact: ZHOU Quan E-mail:zhouqq@gzhu.edu.cn

Abstract:

User’s location privacy often contains sensitive data information. For some existing location privacy protection schemes, because they do not fully consider the reliability of anonymous data and the backward unlinkability of revocation of group members, they cannot protect user's location privacy very well. Therefore, a group signature location privacy protection scheme with backward irrelevance is proposed. The scheme constructed an anonymous set by requesting and responding to requests from users and collaborating users, which avoided the privacy disclosure of requesting users due to the cracking of anonymous servers. The signature private key string was generated by requesting the user's registration time, enabling the scheme to support backward unrelated revocation of the anomalous user. The security analysis and performance analysis show that the scheme has higher security and lower calculation cost.

Key words: anonymous, group signature, location privacy, backward unlinkability

CLC Number: