关键词: 基于身份的签名，聚合签名，可证明安全

Abstract: An aggregate signature scheme was proposed by I3oneh et al. in which multiple signatures can be compressed into a short signature. So it is more efficiency than others. We presented a new ID-based aggregate signature scheme.Compared with the scheme proposed by Xu et al. , our scheme requires less one pairing operation in the signing and verification, respectively. So it is more efficiency than the former. The proposed scheme is secure against existential forgery in the random oracle model by assuming the intractability of the computational DifficHellman (CDH) problem. Otherwise, we analysed the scheme proposed by Chen et al, and fould the scheme cannot against existential forgery.

Key words: ID-based signature, Aggregate signature, Provable security