Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1991-01-22
1993-03-30
Buczinski, Stephen C.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
34082534, 382 3, 382 13, H04K 100, G07D 700, G06K 900
Patent
active
051990687
ABSTRACT:
A signature verification system to accompany a computer-based training system to monitor the identity of the training system user. Using a stylus and digitizing pad as a computer input device, the verification system accepts a user's signature made under supervised conditions, and the computer generates various discriminator data associated with the singature, such as time to write signature, signature density and signature size. The verified, supervised signature and associated discriminator data are stored in encrypted format for security against tampering. During sessions on the training system the user is required to enter a signature at random times. Again, corresponding discriminator data for these session signatures is generated by the computer, and the session signature(s) and associated corresponding discriminator data are also likewise encrypted and stored. At a later time, e.g., after the user has completed the training course, the discriminator data corresponding to the verified signature is compared to the discriminator data corresponding to a session signature, and any anomalous session signatures detected are flagged to alert the training course administration personnel to make visual comparison of the respective signatures.
REFERENCES:
patent: 4701960 (1987-10-01), Scott
patent: 4752965 (1988-06-01), Dunkley et al.
patent: 4993068 (1991-02-01), Piosenka et al.
patent: 5029219 (1991-07-01), Cox
Buczinski Stephen C.
Professional Achievement Systems, Inc.
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