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DRM system

  • US 9,460,271 B2
  • Filed: 07/03/2014
  • Issued: 10/04/2016
  • Est. Priority Date: 09/30/2005
  • Status: Active Grant
First Claim
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1. A domain controller for digital rights management (DRM) to grant access to content, provided by at least one license provider using a provider device to at least one client using a client device, the domain controller comprising:

  • a tangible computer-readable storage-memory that is not a transitory propagating wave or signal, comprising;

    a first state variable for indicating a membership relation in a domain; and

    a second state variable for indicating an association relation with the domain; and

    wherein access to content, provided by at least one provider device, is granted to at least one client device when;

    the domain controller verifies that at least one provider device includes the second state variable in common with the domain controller indicating the association relation between the at least one license provider device and the domain controller; and

    the domain controller verifies that the at least one client device includes the first state variable in common with the domain controller indicating the membership relation of the client device with the domain.

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