2[1]Kohl J, C Neuman. The Kerberos Network Authentication Service (V5)[J]. RFC 1510, Digital Equipment Corporation, USC/Information Sciences Institute, September 1993.
3[2]ITU-T, Recommendation X.509. The Directory-authentication Framework[J]. Consultation Committee, International Telephone and Telegraphm, Inernational Telecommunications Union.
4[3]R L Rivest. RFC 1321. The MD5 Message-digest Algorithm[J]. Internet Request for Comments 1321, Apr. 1992.
5[4]C Rigney, A Rubens, W Simpson, S Willens. RFC 2138, Remote Authentication Dial in User Service (RADIUS)[J]. 1997-04-18.
6Lamport L. Password authentication with insecure communication. Communications of the ACM,1981,24(11): 770~772.
7Hailer N M. The S/Key one-time password system. In:Proc. of the Internet Society Symposium on Network and Distributed System Security, San Diego, CA,Feb. 1994.
8Rigney C, Rubens A, Simpson W, Willens S. Remote Authentication Dial In User Service(RADIUS). RFC 2138, April 1997.
9Rigney C. RADIUS Accounting. RFC 2139, April 1997.
10Steiner J, Neuman B C, Schiller J I. Kerberos : An authentication service for open network systems. In: Proc. Winter USENIX Conference,Dallas, TX, 1988. 191~202.
