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:
Mar. 13, 2012
Filed:
Feb. 09, 2006
Taichi Sato, Osaka, JP;
Rieko Asai, Osaka, JP;
Yoshikatsu Ito, Osaka, JP;
Kouichi Kanemura, Osaka, JP;
Hideki Matsushima, Osaka, JP;
Taichi Sato, Osaka, JP;
Rieko Asai, Osaka, JP;
Yoshikatsu Ito, Osaka, JP;
Kouichi Kanemura, Osaka, JP;
Hideki Matsushima, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A program conversion device generates a program by obfuscating an original program, and generates and encrypts conversion parameters for inverse conversion of the obfuscated program. The program conversion device distributes the obfuscated program together with the encrypted conversion parameters. To execute the obfuscated program, a device having a high security level decrypts the encrypted parameters by using a decryption key stored in advance, applies inverse conversion to the obfuscated program by using the decrypted conversion parameters, and executes the program resulting from the inverse conversion. A device having a low security level executes the obfuscated program without any inverse conversion.