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System and method for enhanced piracy protection in a wireless personal communication device

  • US 20030026432A1
  • Filed: 07/31/2001
  • Published: 02/06/2003
  • Est. Priority Date: 07/31/2001
  • Status: Active Grant
First Claim
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1. A method of controlling content usage in a personal communication device using a decryption key that is divided into a plurality of key-shares, the method comprises:

  • providing the personal communication device a first key-share in response to a request for content; and

    verifying credit of a user of the personal communication device;

    providing the personal communication device a second key-share when the credit is confirmed; and

    combining the first and second key-shares with a third key share stored in the personal communication device for use in decrypting content.

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