Importance

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Abstract

A video on demand (VOD) method, consistent with the invention involves storing multiple selective encrypted VOD content on a VOD server; receiving an order for the VOD content specifying delivery to a target decoder; determining what CA encryption system is associated with the order; stripping all encrypted segments from the multiple selectively encrypted content that are not associated with the order to produce single selectively encrypted VOD content; and sending the single selectively encrypted VOD content to the target decoder. The multiple selectively encrypted VOD content can be created by examining unencrypted data representing digital content to identify segments of content for encryption; encrypting the identified segments of content using a first encryption method associated with a first conditional access system to produce first encrypted segments; encrypting the identified segments of content using a second encryption method associated with a second conditional access system to produce second encrypted segments; and replacing the identified segments of content with the first encrypted content and the second encrypted content in the digital content, to produce the multiple selectively encrypted VOD content.

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First Claim