Method and system for changing an authorization password or key

Details Method and system for changing an authorization password or key Method and system for changing an authorization password or key

1996-02-08

1998-07-07

Cangialosi, Salvatore

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 25, H04L 900

Patent

active

057780650

ABSTRACT:
A robust and secure password (or key) change method between a user and an authentication server in a distributed communication network is disclosed. The protocol requires the exchange of only two messages between the user desiring the key change and the server, the user's request including, at least partly encrypted, an identification of the sending user, old and new keys, and two nonces, at least one including a time indication. The authentication server's response includes a possibly encrypted accept/reject indication and the regularly encrypted request from the user.

REFERENCES:
patent: 5148479 (1992-09-01), Bird et al.
patent: 5224163 (1993-06-01), Gasser et al.
patent: 5347580 (1994-09-01), Molva et al.
patent: 5369705 (1994-11-01), Bird et al.
patent: 5371794 (1994-12-01), Diffie et al.
patent: 5418854 (1995-05-01), Kaufman et al.
patent: 5491750 (1996-02-01), Bellare et al.
patent: 5629980 (1997-05-01), Stefik et al.

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