×

METHOD FOR PREVENTING LAUNDERING AND REPACKAGING OF MULTIMEDIA CONTENT IN CONTENT DISTRIBUTION SYSTEMS

  • US 20110016311A1
  • Filed: 04/07/2009
  • Published: 01/20/2011
  • Est. Priority Date: 04/07/2008
  • Status: Active Grant
First Claim
Patent Images

1. Method for distributing content in a content distribution system comprising the steps of:

  • encrypting at a Content Packager a content using a content encryption key (Kc) to generate an encrypted content (C);

    sending the content encryption key to a Licensing Authority;

    receiving from the Licensing Authority a distribution key containing an encryption of the content decryption key for a given set of authorized devices;

    creating a secure link between the content encryption key and the content protected by this content encryption key using a signature of the content; and

    distributing the encrypted content together with at least a part of the signature of the content;

    wherein the content signature is generated by signing at the Content Packager the content and;

    wherein the content signature is used to compute the content encryption key.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×