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Binding digital content to a portable storage device or the like in a digital rights management (DRM) system

  • US 7,010,808 B1
  • Filed: 08/25/2000
  • Issued: 03/07/2006
  • Est. Priority Date: 08/25/2000
  • Status: Expired due to Fees
First Claim
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1. A method for enabling the rendering of digital content on a device, the method comprising:

  • transferring the content to the device;

    obtaining a digital license corresponding to the content;

    composing a sub-license corresponding to and based on the obtained license and transferring the composed sub-license to the device, to enable rendering of the content on the device only in accordance with the terms of the sub-license on the device, wherein the composed sub-license is transferred to the device after transferring the content to the device,wherein the content is encrypted and decryptable according to a content key and wherein the license includes the content key encrypted into a form un-decryptable by the device, the composing of the sub-license comprising re-encrypting the content key into a form that is decryptable by the device and placing the re-encrypted content key in the sub-license, andwherein the composing of the sub-license further comprises placing indexing information in the sub-license, the indexing information identifying a secret to the device that the device employs to decrypt the encrypted content key.

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