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:
Oct. 08, 2013
Filed:
Jan. 05, 2010
Takayuki Ito, Osaka, JP;
Manabu Maeda, Osaka, JP;
Tomoyuki Haga, Nara, JP;
Hideki Matsushima, Osaka, JP;
Yuichi Futa, Osaka, JP;
Kouji Kobayashi, Osaka, JP;
Takayuki Ito, Osaka, JP;
Manabu Maeda, Osaka, JP;
Tomoyuki Haga, Nara, JP;
Hideki Matsushima, Osaka, JP;
Yuichi Futa, Osaka, JP;
Kouji Kobayashi, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Information processing apparatus () ensures confidentiality of encryption and reduces overhead associated with processing not directly related to the encryption. The information processing apparatus () includes: application program (A) that includes an instruction for encryption which uses a key; tampering detection unit () that detects tampering of the program; CPU () that operates according to instructions and outputs a direction for encryption upon detecting the instruction for encryption; data encryption/decryption function unit () that controls switching to the protective mode according to the direction; and protected data operation unit () that stores a key in correspondence with the program, outputs the key in the protective mode, and controls switching to the normal mode, and the data encryption/decryption function unit () executes the encryption in the normal mode using the received key.