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DIGITAL RIGHTS MANAGEMENT LICENSE IDENTIFICATION

  • US 20100070416A1
  • Filed: 09/18/2008
  • Published: 03/18/2010
  • Est. Priority Date: 09/18/2008
  • Status: Active Grant
First Claim
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1. A method of building a license for implementing digital rights management, the method comprising:

  • assigning a content key to the license, the content key configured to decrypt content data encrypted by a symmetric cryptographic content key;

    assigning a policy to the license, the policy defining circumstances in which the content key is allowed to decrypt content data encrypted by the symmetric cryptographic content key;

    finding a digital fingerprint of a portion of the policy; and

    assigning the digital fingerprint to the license as an identifier for the license.

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