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System and method for managing copyrighted electronic media

  • US 20040167858A1
  • Filed: 02/17/2004
  • Published: 08/26/2004
  • Est. Priority Date: 10/13/1995
  • Status: Active Grant
First Claim
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1. A method for protecting electronic media, comprising:

  • encrypting the media;

    transmitting the encrypted media—

    together with data indicating a first set of permissions—

    to a user device;

    decrypting and using the electronic media at the user device in accordance with the first set of permissions;

    sending a signal from the user device requesting additional permissions;

    receiving at the user device data representing additional permissions; and

    using the electronic media at the user device in accordance with the additional permissions.

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