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1[1]Kohl J, C Neuman. The Kerberos Network Authentication Service (V5)[J]. RFC 1510, Digital Equipment Corporation, USC/Information Sciences Institute, September 1993.
2[2]ITU-T, Recommendation X.509. The Directory-authentication Framework[J]. Consultation Committee, International Telephone and Telegraphm, Inernational Telecommunications Union.
3[3]R L Rivest. RFC 1321. The MD5 Message-digest Algorithm[J]. Internet Request for Comments 1321, Apr. 1992.
4[4]C Rigney, A Rubens, W Simpson, S Willens. RFC 2138, Remote Authentication Dial in User Service (RADIUS)[J]. 1997-04-18.
