Electronic signature method and apparatus

Details Electronic signature method and apparatus Electronic signature method and apparatus

1996-11-01

1997-11-18

Tarcza, Thomas H.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 45, 380 30, 380 23, H04K 100

Patent

active

056895674

ABSTRACT:
Electronic signature apparatus and method provide an electronic signature that can be created only by a signer, but cannot be used for other than the signature object document to be processed, and that can be verified and authenticated as an image. Since the verified result is an image, such as a print of a seal and a signature, the verifier can easily verify the validity of the image. In addition, since a signature image and a signature object document may separately be processed, combined, and decomposited upon decryption, they can effectively be used for a printed signature.

REFERENCES:
patent: 4405829 (1983-09-01), Rivest et al.
patent: 4879747 (1989-11-01), Leighton et al.
patent: 5005200 (1991-04-01), Fischer
patent: 5355411 (1994-10-01), MacDonald
patent: 5465299 (1995-11-01), Matsumoto et al.
Ford, Computer Communications Security, Principles, Standard Protocols and Techniques, pp. 64-85, (1994).
Ikeno et al., "Theory Of Modern Cryptographic Techniques", The Institute of Electronics, Information and Communications Engineers, Japan, (1986).

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