Brevet : EP1730619 - SYSTEME DE DETECTION DE CONTENUS NON AUTORISES

Titre

SYSTEME DE DETECTION DE CONTENUS NON AUTORISES

N° et date de publication de la demande

EP1730619 - 13/12/2006

Type de la demande

A1

N° et date de dépôt

EP05727373.2 - 24/03/2005

N° et date de priorité

JP2004110069 - 02/04/2004 ; JP2004146963 - 17/05/2004 ; JP2004151621 - 21/05/2004 ; JP2004163734 - 01/06/2004 ; JP2004196531 - 02/07/2004 ; JP2004201009 - 07/07/2004 ; JP2004206335 - 13/07/2004

Famille de brevets

AU2005227472A1 ; JP2007274716A ; CN101086759A ; MY150302A ; EP1850258A2 ; CN1961274A ; US2007198838A1 ; TW200821892A ; US2008034442A1 ; WO2005096119A1 ; CN101086880A ; CN101329714A ; EP1730619A1 ; ES2363517T3 ; ES2660165T3 ; US2012290846A1 ; CA2560395A1 ; EP1840782A2 ; US2014129842A1 ; JP2007274717A ; ATE509321T1 ; TW200539706A ; US2011119493A1 ; US2008034443A1 ; US2015127948A1 ; TW200816021A ; KR20060135934A ; JP2007535189A ; MY147696A ; JP2008176814A ; BRPI0509577A

Abrégé

Processing load on an executing device for conducting playback is high during the playback of contents since the executing device performs verification of the contents validity in parallel with the contents playback, and therefore the executing device has to be equipped with a highly efficient processor. The present invention reduces the processing load involved in the verification by using, for the verification, only a predetermined number of encrypted units selected randomly from multiple encrypted units constituting encrypted contents recorded on the DVD. In addition, the present invention is capable of improving the accuracy of detecting unauthorized contents to some extent by randomly selecting a predetermined number of encrypted units every time the verification is performed.