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Method for joining user domain and method for exchanging information in user domain

  • US 8,856,510 B2
  • Filed: 12/15/2008
  • Issued: 10/07/2014
  • Est. Priority Date: 01/31/2008
  • Status: Active Grant
First Claim
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1. A method for joining a user domain based on digital rights management (DRM), comprising:

  • in a user device, transmitting a domain join request message including a first domain session key to a domain enforcement agent managing the user domain; and

    receiving a domain join response message from the domain enforcement agent in response to the domain join request message, the domain join response message including a second domain session key,wherein a new domain session key different from the second domain session key is requested from the domain enforcement agent, and the new domain session key allows the user device to share encrypted information with another user device, the new domain session key comprising a key value obtained by using the first domain session key and the second domain session key.

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