<p>A method of and system for digital rights management, in which access to a piece of content is granted in accordance with a license owned by a license owner to a client who is a member of a domain. This requires successfully verifying that a membership relation exists between the client and the domain as reflected in a first state variable, and that an association relation exists between the license owner and the domain as reflected in a second state variable. Both relationships are revoked by executing an online protocol between the parties in the relationship after which both remove the corresponding state variable. The domain controller propagates the state administration relating to the domain is propagated to the client so that the client can update its state administration.</p>
申请公布号
EP1938237(A2)
申请公布日期
2008.07.02
申请号
EP20060821102
申请日期
2006.09.18
申请人
KONINKLIJKE PHILIPS ELECTRONICS N.V.
发明人
BAKS, WOUTER;KAMPERMAN, FRANCISCUS, L., A., J.;LENOIR, PETRUS, J.;SZOSTEK, LUKASZ