4DIFFIE W, HELLMAN M E. New directions in cryptography [J]. IEEE Transactions on Information Theory, 1976, 22(6) : 644-654.
5KOHNFELDER L M. Towards a practical public-key cryptosystem [D]. Cambridge, Massachusetts : Massachusetts Institute of Tech- nology, 1978.
6BONEH D, FRANKLIN M K. Identity-based encryption from the Weil pairing [C]// Proceedings of the 21st Annual International Cryptology. Santa Barbara, CA, USA : CRYPTO, 2001 : 213-229.
7SHAMIR A. Identity-based cryptosystems and signature schemes [C]// Proceedings of CRYPTO 84 on Advances in Cryptology. Santa Barbara, CA, USA CRYPTO, 1984 : 47-53.
