Computer access control system and method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 22, 1991
Grant Date -
N/A
app pub date -
Mar 9, 1988
filing date -
Mar 9, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An access control system is disclosed in which protected systems and corresponding portable password issuing devices both generate new authentic passwords by successively encrypting a stored password with a selected sequence of predefined encryption steps. The protected system generates and displays one or more random digits, selects an encryption sequence by appending the random digits to the user's personal identification number, and generates an authentic password by sequentially encrypting the user's previous password with encryption steps corresponding to each of the digits in the selected encryption sequence. The user generates a purported password by entering his PIN and the displayed random number(s) on the keyboard of his password issuing device, which responds to encrypting a stored previous password value with encryption steps corresponding to the user's keystrokes, and displaying a new password on its display. The user submits his purported new password to the protected system, and the protected system enables access to the protected system when the purported password matches the internally generated authentic password. Each password issuing device can store and generate passwords for a multiplicity of distinct protected host systems.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully