H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 7/10 (2006.01) H04N 7/16 (2006.01) H04N 7/167 (2006.01) H04N 7/173 (2006.01)
Patent
CA 2368195
A method and apparatus (102) for enabling conditional access to on-demand content of variable duration by utilizing either real time encryption of the content or pre-encryption of the content. In either case, embedding decryption messages and impulse authorizations are included with the pre-encrypted information stream.
L'invention porte sur un procédé et un appareil permettant l'accès conditionnel à un contenu à la demande de durée variable en utilisant soit le cryptage en temps réel du contenu, soit le précryptage du contenu. Dans les deux cas, l'intégration des messages de décryptage et les autorisations d'impulsions sont comprises dans le flux d'informations précryptées.
Diva Systems Corporation
Riches Mckenzie & Herbert Llp
Sedna Patent Services Llc
LandOfFree
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