British Telecommunications Public Limited Company

Robert E Semos

Richard B Ward

Michael J Kenning

Mark Wilby

David A Roberts

Patrick S Brady

Mark J Stirland

Vivek Tandon

Optical communications networks

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).

Personal identification systems

Growing community of inventors

Kent, United Kingdom

Robert E Semos