Personal identification systems

US5606614A · kind A · utility

Assignee

• BRITISH TELECOMMUNICATIONS public limited company · GB

Inventors

• Patrick Brady · New Orleans, US
• Michael J. Kenning · Stowmarket, GB
• David A. Roberts · Santa Cruz, US
• Robert Semos · Ashford, GB
• Mark Stirland · Ipswich, GB
• Richard B. Ward · Redmond, US

Key dates

• Filing date: Apr 19, 1996
• Grant date: Feb 25, 1997
• Expiry date: Apr 19, 2016

Classification

• Technology area (CPC G): Physics
• CPC primary: G07F7/1025
• WIPO field: IT methods for management
• WIPO sector: Electrical engineering

Abstract

In personal identification systems which compare passwords in a verification computer to identify a user, successive passwords are generated, or retrieved from a stored list in the verification computer in response to each entry of a public username into the verification computer. A user device carried by the user retrieves the next successive password from a stored list in response to a command from the user and displays the password. The user then reads this password and offers it to the verification computer via a keyboard entry to be compared with the password already generated or retrieved in response to the username (the expected password).