Electronic document security system, affixed electronic seal sec

Details Electronic document security system, affixed electronic seal sec Electronic document security system, affixed electronic seal sec

1997-02-25

1999-09-07

Auve, Glenn A.

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Protection at a particular protocol layer

380 25, H04K 100

Patent

active

059481030

ABSTRACT:
An electronic document security system, a fixed electronic seal security system, and an electronic signature security system. A method for security coding a document uses a symbolic figure such as a signature or a seal. An electronic document including a symbolic figure is stored. The electronic document is encoded in accordance with a confidential key and a predetermined characteristic is extracted from the encoded electronic document. The symbolic figure is then modified in accordance with the characteristic. The confidential key and the symbolic figure may be stored in a portable media to increase the security.

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patent: 5031214 (1991-07-01), Dziewit et al.
patent: 5606609 (1997-02-01), Houser et al.
patent: 5689567 (1997-11-01), Miyauchi
patent: 5706427 (1998-01-01), Tabuki
patent: 5719940 (1998-02-01), Ahn et al.
Rivest, Ronald L., "The MD5 Message-Digest Algorithm," MIT Laboratory for Computer Science and RSA Data Security, Inc., Apr. 1992.

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