Efficient short group signature with IND-CCA2 full-anonymity
Zhanjun Wang · Jisuanji yingyong yanjiu · 2009
This paper presented a new zero-knowledge protocol for SDH,which was based on improved Cramer-Shoup encryption from DDH,TCRv,KEA3 assumption and SDH assumption.Using this protocol as a building block,constructed a new short group signature,which was provable secure in the BMW model,the scheme was of IND-CCA2-full-anonymity,and the signature was only 1 193 bit in size.Compared with other related works,this method was of higher efficiency and shorter size of group signature at the cost of strong assumptions.