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:
Jun. 12, 2012
Filed:
Aug. 25, 2008
Hideki Matsuo, Nagoya, JP;
Hirotsugu Unotoro, Nagoya, JP;
Yasushi Yanagihara, Nagoya, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
To prevent a preview of contents by a person who does not have a right to view or listen, by distributing encoded contents data which are difficult for a third person to decode. A new participation terminal apparatus, as well as transmitting a participation request to a parent terminal apparatus of a connection destination candidate, transmits a participation disclosure key for encoding a contents decoding key. The parent terminal of the connection destination candidate which receives the participation disclosure key from the new participation terminal apparatus generates an encoded decoding key, which is a contents decoding key encoded using the participation disclosure key received, and transmits it to the new participation terminal apparatus. The new participation terminal apparatus decodes the encoded decoding key received, using a participation secret key stored in a participation key storage section, acquiring a contents decoding key. Using the contents decoding key, the new participation terminal apparatus decodes distributed encoded contents data, and carries out a reproduction process.