The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 1997
Filed:
Nov. 01, 1996
Applicant:
Inventor:
Hiroshi Miyauchi, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04K / ;
U.S. Cl.
CPC ...
380 25 ; 380 45 ; 380 30 ; 380 23 ;
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.