Weaknesses of a Dynamic Threshold Group Signature Scheme
Jianxi Yang · Journal of Chongqing Jiaotong University · 2008
All of the existing threshold group signature schemes have weaknesses.The design of an efficient scheme is remained open in cryptography.The weaknesses of a dynamic threshold group scheme are analyzed.The most serious weakness is that part of members can conspire to get system secret parameters and then forge a valid signature.