An Efficient Group Signature Scheme in Open Public Data Scenario

In recent years, public data openness has become the focus of attention in various countries, however, there are still some security problems in the data supply link, especially in ensuring the integrity, validity and traceability of the supplied data. In order to strengthen the security and traceability of the data supply link, this paper proposes a secure and efficient group signature scheme. The security of the scheme is based on the mathematically difficult problem assumptions of ECDLP, and realizes the dynamic join and revoke functions of group members. Meanwhile, after correctness analysis and performance evaluation, the scheme further improves the efficiency of member joining, signing and verification on the basis of ensuring security.