G - Physics – 11 – B
Patent
G - Physics
11
B
G11B 7/24 (2006.01) G11B 7/26 (2006.01) G11B 20/00 (2006.01) G11B 23/28 (2006.01)
Patent
CA 2434538
The present invention involves the modification of optical media (63,69,72) such that selected portions (57-62,64-68) of the media are physically altered, in order to distort and/or attenuate the transmission of such optical signal to a predetermined degree. This slows the copying process to a desired extent by creating media that generates measurable changes in the system's timing and performance related to how and when data is read in standard optical media rives copying devices, in a fashion that makes the process of copying the media more time consuming and difficult, as a deterrent to any such copying. The present invention can create instances of optical media that have uniquely identifiable attributes, whose properties are not encoded as data. These properties form a media signature that may be calculated as a metric of optical media drive and/or system and subsystem performance. The principal benefit of these identifying attributes is that since they are induced by physical means, a purely data-driven bit-for-bit copy of a disc cannot represent all of the necessary attributes inherent in the original disc.
Le vol, la distribution et le piratage de contenus numériques sur supports optiques (logiciels, vidéo, audio, livres électroniques, tout contenu stocké et distribué sur le plan numérique) sont souvent perpétrés par copie directe sur un autre disque au moyen d'outils de copie généralement disponibles et de supports optiques enregistrables ou par copie des supports sur un autre disque produit en masse. Les procédés de cette invention qui rendent le processus de copie long et risqué ou qui produisent des copies considérablement différentes de l'original et donc fortement reconnaissables, peuvent permettent de décourager ou d'empêcher une personne non autorisée à faire des copies. Ce procédé offre des avantages de taille aux créateurs de contenus qui souhaitent protéger leurs produits.
Hart John J. III
Howard Daniel G.
Lee Andrew R.
Levine Richard B.
Ecd Systems Inc.
Gowling Lafleur Henderson Llp
Sca Ipla Holdings Inc.
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