06851051 is referenced by 84 patents and cites 8 patents.

An integrated signal sensor with processing power to augment a challenge from server and compute the response is proposed to guarantee that the sensed signal is live and not stored. The sensor-processor computes the response to the augmented challenge based on the signal charactersitics of the sensed signal and then transmits both the signal and the response. The host or the server can verify the response to authenticate liveness of the input image/signal and reject it if the response is different. Areas of application include automated biometrics and remote medical imaging.

Title
System and method for liveness authentication using an augmented challenge/response scheme
Application Number
9/290645
Publication Number
6851051 (B1)
Application Date
April 12, 1999
Publication Date
February 1, 2005
Inventor
Nalini K Ratha
White Plains
NY, US
Jonathan Hudson Connell
Cortlandt-Manor
NY, US
Rudolf Maarten Bolle
Bedford Hills
NY, US
Agent
Louis J Percello Esq
Assignee
International Business Machines Corporation
NY, US
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