An Efficient Dynamic Group Signature Scheme
Huang Yu-ying · Information Security and Communications Privacy · 2010
In a group signature system,the efficient deletion of certain member is an important research topic. An efficient member deletion scheme proposed by WANG Shang-ping is effective,however,is also proved that it could not really delete group members. Based on the principle of WANG's deletion scheme,an improved scheme with Chinese Remainder Theorem is proposed,which makes sure that legitimate members' renewed operators of secret property keys are different from each other. In this way,the deletion could be really achieved. The improved scheme,based on the difficulty of strong RSA assumption and large integers decomposition,is of much higher security.