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Composite session-based encryption of Video On Demand content

  • US 20050129233A1
  • Filed: 04/13/2004
  • Published: 06/16/2005
  • Est. Priority Date: 12/16/2003
  • Status: Active Grant
First Claim
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1. A Video On Demand (VOD) method, comprising:

  • processing content by selecting first portions of the content for encryption under a selective encryption system and selecting second portions of the content to remain unencrypted;

    storing the first portions;

    storing second portions;

    receiving a request for delivery of the content;

    determining if the request is from a terminal having decryption capabilities associated with a first decryption method or a second decryption method;

    if the request is from a terminal having decryption capabilities associated with the first decryption method, then;

    routing the first portions to a first encryption device;

    routing the second portions around the first encryption device;

    encrypting the first portions using a first encryption process at the first encryption device to produce encrypted first portions; and

    assembling a stream of selectively encrypted content from the encrypted first portions and the second portions.

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