Apparatus and method for authenticating digital signatures...

Details Apparatus and method for authenticating digital signatures... Apparatus and method for authenticating digital signatures...

2006-04-04

2006-04-04

Morse, Gregory (Department: 2134)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C380S054000, C382S100000, C705S050000

Reexamination Certificate

active

07024558

ABSTRACT:
In an apparatus for authenticating a digital signature, a signature generating part encrypts a digital document by using a private key defined by a signer and digest information for checking whether the digital document has been tampered with, and generates a digital signature. A signature synthesizing part creates image information by synthesizing the digital signature and a predetermined mark. And an image embedding part embeds the image information created by said signature synthesizing part into an indicated position in the digital document.

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