Signature authenticating apparatus, signature authenticating...

Details Signature authenticating apparatus, signature authenticating... Signature authenticating apparatus, signature authenticating...

2006-04-25

2006-04-25

Jung, David (Department: 2134)

Cryptography

Particular algorithmic function encoding

Public key

C382S186000, C382S187000, C713S176000

Reexamination Certificate

active

07035406

ABSTRACT:
An entered signature is compared with registered signature data to calculate an evaluation value, and when the evaluation value for the entered signature is within the allowable range for successful authentication, it is determined whether aging has occurred. When aging is determined to have occurred, a warning message is displayed to urge re-registration of the signature. According to such a configuration, it is possible, when a change in signature is caused by aging, to avoid circumstances in which authentication becomes suddenly impossible.

REFERENCES:
patent: 5606663 (1997-02-01), Kadooka
patent: 6496937 (2002-12-01), Ichihara
“Digital Unix Security” Sections 1,2,6, and 9, Mar. 1996, [Retrieved from Internet Nov. 29, 2004], http://www.henderson.edu/documentation/AQ0R2DTE/TOC.HTM.
Trace copy forgery detection for handwritten signature verification; Deng et al.; Security Technology, 2003. Proceedings. IEEE 37th Annual 2003 International Carnahan Conference on Oct. 14-16, 2003 pp. 450-455.
Digital technique to analyze handwritten signatures; Dhar et al.; Security Technology, 1988. Crime Countermeasures, Proceedings. IEEE 1988 International Carnahan Conference on Oct. 5-7, 1988 pp. 9-13.
The handwritten signature in pen computing; Smithies, C.P.K.; Handwriting and Pen-Based Input, IEE Colloquium on 1994 pp. 2/1-2/3.
U.S. Appl. No. 09/722,703, filed Nov. 28, 2000.

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