Dynamic Group Signatures Scheme with CCA-anonymity in Standard Model
Yue Xiao-ha · Journal of Chinese Computer Systems · 2015
Group signatures are a central cryptographic primitive,simultaneously supporting anonymity and traceability. Though numbers of group signatures schemes have been presented,some drawbacks still exist in these schemes at the aspects of security,performance and functionality. In order to overcome these issues,this paper proposes a new dynamic group signatures scheme with CCA-anonymity,allowing the members enroll the group dynamically. By making use of the Groth-Sahai proof system,this paper constructs the scheme in detailed,and in standard model formally proves the security including CCA-anonymity,traceability and non-frameability. Finally,compared with other existing group signatures schemes,the proposed scheme is more security and efficient on both the computational cost and communication cost.