Patent ID: 7975280
Filing Date: 2011-07-05
Classification: H04N

Abstract:
1. A conditional access control apparatus, comprising: a pre-encryption module, for retrieving un-encrypted content, encrypting content to form pre-encrypted content, embedding a descrambling message with a descrambling key and an impulse authorization into a encrypted content stream with the pre-encrypted content and associating an event identifier with the encrypted content stream associated with the pre-encrypted content before said pre-encrypted content is requested by a requesting subscriber, the event identifier linking the encrypted content steam associated with the pre-encrypted content with the embedded descrambling message and impulse authorization; a content and asset module, for storing the encrypted content stream associated with the pre-encrypted content after the retrieved un-encrypted content has been encrypted to form the pre-encrypted content and a descrambling message and impulse authorization has been embedded therewith; a transport processor configured to insert the encrypted content stream associated with the pre-encrypted content stored in the content and asset module into a forward application transport channel (FATC); and a controller, for receiving a request from a subscriber identifying content by an event identifier, receiving event identifiers from the pre-encryption module, processing the event identifiers received from the pre-encryption module to identify the encrypted content stream stored in the content and asset module having an event identifier matching the event identifier of the content requested by the subscriber, transmitting a signal to the subscriber indicating a FATC for the subscriber to tune to for receiving the requested content, initiating transfer of the identified encrypted content stream from the content and asset module to the transport processor, causing the transport processor to modulates the encrypted content stream onto a carrier frequency associated with the FATC indicated to the subscriber, wherein the event identifier associated with the content request is used to determine the impulse authorization associated with the encrypted content stream for authorizing use of the key in the descrambling message to decrypt the pre-encrypted content in the encrypted content stream received via the FATC.