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:
Nov. 16, 2010
Filed:
Jul. 11, 2006
Ryuichi Okamoto, Osaka, JP;
Takuji Hiramoto, Osaka, JP;
Atsunori Sakurai, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Security is secured according to the type of a license so that unnecessary processing load is reduced. A license accumulation control unit () and a license transfer control unit () identifies a usage-rule type () which indicates whether or not a license () includes a usage rule () which requires updating each time a content is used, and encrypts the license () by using different encrypting methods depending on whether or not the usage rule () is included in the license (). The license accumulation control unit () encrypts a content key: with a domain key when the licensedoes not include the usage rule (); and with a license management device unique key, when the usage rule () is included, and accumulates the encrypted key in a license accumulation unit (). The license transfer control unit (), when the license () does not include the usage rule (), reads the license () from the license accumulation unit () and transfers the license () with encryption maintained by using a license transfer unit (transfer method B) ().