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:
Dec. 09, 2008
Filed:
May. 09, 2003
Nobuhiro Tagashira, Kanagawa, JP;
Keiichi Iwamura, Kanagawa, JP;
Junichi Hayashi, Kanagawa, JP;
Yuji Suga, Kanagawa, JP;
Nobuhiro Tagashira, Kanagawa, JP;
Keiichi Iwamura, Kanagawa, JP;
Junichi Hayashi, Kanagawa, JP;
Yuji Suga, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In an image process apparatus, a key different for each level of hierarchy is generated on the basis of a specific key with respect to image data having a hierarchical structure, the image data in each level of the hierarchy is encrypted using the generated key for each level, and the specific key is managed, so that key management can be easily performed while the image data having a hierarchical structure is enciphered using different keys for each level of the hierarchy.