A Group of Threshold Group-Signature Schemes with Privilege Subsets
Chen Weidong, Feng Dengguo · Kluwer Academic Publishers eBooks · 2006
Reference[9] proposed a threshold group-signature scheme in order to solve the problem so called “threshold group-signature scheme with privilege subsets” suggested by Feng Dengguo. We firstly show there exist some insufficiencies and potential hazard in the scheme mentioned above. Secondly, Using the idea of constructing group-signature schemes by individual signature schemes, we put forward a group of the ones with four variants of ElGamal type, having many attractive properties such as shorter length of signature, message recovery, authentication and so on. Finally, the security of our schemes is proved in the standard model.