3Cha,J.C.& Cheon,J.H.(2003).An identity-based signature from gap diffie-hellman groups[C].Lect.Notes Computer Sci., 2567:18-30.
4Boneh,D.,Lynn,B.& Shacham,H.(2001).Short Signature from the Well Pairing[C].Advances in Cryptology-Asiacrypt' 01, Springer Verlag.
5Hwang, S.J. and Chen,C.C.(2001).A new multi-proxy multi-signature scheme~C].National Computer Symposium: Information Security, Taipei, F019-F026.
6Mambo, M., Usuda, K. & Okamoto, E.(1996). Proxy Signature for Delegating Signing Operation[C]. Proceedings of the 3.th ACM Conference on Computer and Communications Security, New Detdi, India, ACM Press, New York, 48-57.
