05163097 is referenced by 81 patents and cites 13 patents.

Disclosed is a method and apparatus that protects user passwords and identification numbers by using dynamic and fixed cipher keys to generate one-time access codes that are recognized by an authorization center. The authorization center provides a user with a pool of user selectable algorithms that are easily remembered by a user. When access is desired the user mentally generates and subsequently enters a non-machine generated access code formed by using the selected algorithm, the password, and a dynamic variable. The authorization center also generates a corresponding access code using stored user data. If the two access codes match access is granted.

Title
Method and apparatus for providing secure access to a limited access system
Application Number
7/741705
Publication Number
5163097
Application Date
August 7, 1991
Publication Date
November 10, 1992
Inventor
Tina C Pegg
Jackson
FL, US
Agent
Welsh & Katz
Assignee
DynamicServe
IL, US
IPC
H04R 1/00
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