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:
Jul. 07, 2005
Applicant:
Hirotaka Ittogi, Susono, JP;
Inventor:
Hirotaka Ittogi, Susono, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 29/06 (2006.01); G09C 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An encryption apparatus divides input original data into one or more data blocks. The size of each data block is an integer multiple of the bank size of a non-volatile memory equipped in a decryption apparatus. The encryption apparatus generates authentication data from this data block. The encryption apparatus generates encrypted data after it combines the authentication data to the data block. On the other hand, a decryption apparatus executes reverse processes to decrypt original data, and writes it in a non-volatile memory.