Patent ID: 6094721
Filing Date: 2000-07-25
Classification: G06F,H04L

Abstract:
In a client process capable of attempting access to one or more server processes, an apparatus for enabling authentication of a password which is changed from time to time, the apparatus comprising:a. identification logic configured to maintain a plurality of keys associated with the client process, each of the keys associated with a password, one of the keys being designated as current and derived from a current password that is in use, other of the keys designated as non-current and derived from non-current previously-used passwords;b. response logic configured to allow access to a server process if any one of the current and non-current keys corresponds to authentication data with which the server process challenged an access attempt by the client process; andc. update logic configured to provide a current key identifier to the server process, if the authentication data did not correspond to the current key.