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:
Jan. 19, 2010
Filed:
Feb. 13, 2006
Applicant:
Keiichi Iwamura, Yokohama, JP;
Inventor:
Keiichi Iwamura, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/32 (2006.01); H04L 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The secret data is acquired externally by making an arithmetic operation between unique information of an apparatus and the first information managed secretly, and secretly held as key data in a key holding part. A MAC generation part generates the authentication data based on a hash value obtained from the data to be protected and the key data held in the key holding part. An image file generation part generates an image file to provide the unique information and the authentication data together with the data to be protected.