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System and method for controlled copying and moving of content between devices and domains based on conditional encryption of content key depending on usage state

  • US 20030076955A1
  • Filed: 10/18/2001
  • Published: 04/24/2003
  • Est. Priority Date: 10/18/2001
  • Status: Active Grant
First Claim
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1. A method of protecting content comprising:

  • receiving content at a device;

    encrypting the content with a content key;

    encrypting the content key with a domain key; and

    storing the encrypted content key and the encrypted content.

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