1. Boneh, D., Ding, X., Tsudik, G., Wong, C.M.: A method for fast revocation of public key certificates and security capabilities. In: 10th USENIX Security Symposium, pp. 297–308 (2001)
2. Das, M.L., Saxena, A., Gulati, V.P.: An efficient proxy signature scheme with revocation. Int.Jounal Informatica 15(4), 455–464 (2004)
3. Kaliski, B.S.: A response to DSS (November 1991)
4. Lecture Notes in Computer Science;S. Kim,1997
5. Lee, B., Kim, H., Kim, K.: Strong proxy signature and its applications. In: Proceedings of SCIS 2001, pp. 603–608 (2001)