Security Analysis on a Group Signature Scheme
Bin Huang, Shi Li Liang, Deng Xiao-hong · Jisuanji gongcheng · 2013
This paper analyzes the security of Li et al's group signature scheme.In this scheme,group manager can get any user's secret key,thus it can forge any user's group signature,and forger can get a valid group signature of any user on any message,which leads to the scheme can be forged universally.Two attacks are presented,which shows the scheme does not satisfy traceability and is not secure.