
One Time Password Parameters

(last updated 2001-05-04)

Registries included below:
- Algorithm Identifier
- Extension set identifiers


Registry Name: Algorithm Identifier
Reference: [RFC2289]
Registration Procedures: Not defined?

Note: The syntax of the challenge is:
      otp-<algorithm identifier> <sequence integer> <seed>

Registry:
Algorithm Identifier  Description                             Reference
--------------------  --------------------------------------  ---------
md4                   MD4 Message Digest                      [RFC2289]
md5                   MD5 Message Digest                      [RFC2289]
sha1                  NIST Secure Hash Algorithm Revision 1   [RFC2289]


Registry Name: Extension set identifiers
Reference: [RFC2243]
Registration Procedures: IESG approval

Registry:
Extension Set Id   Description                           Reference
-----------------  ------------------------------------  ---------
hex                hexadecimal number                    [RFC2243]
word               six dictionary words                  [RFC2243]
init-hex           re-initialize using hexadecimal       [RFC2243]
init-word          re-initialize using six words         [RFC2243]


References
----------
[RFC2289] Haller, N., C. Metz, P. Nesser, and M. Straw, "A One-Time
          Password System", RFC 2289, Bellcore, Kaman Sciences
          Corporation, Nesser and Nesser Consulting, February 1998.

[RFC2243] Metz, C., "OTP Extended Responses", RFC 2243, The Inner Net,
          November 1997.




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