DRM system
First Claim
1. A method of digital rights management for granting access to content owned by at least one license owner device to at least one client device, the method comprising acts of:
- providing on the at least one client device and a controller device a first state variable indicating a membership relation of the at least one client device in a domain;
providing on the at least one license owner and controller devices a second state variable indicating an association relation between the at least one license owner device and the domain,granting access to the content owned by the at least one license owner device to the at least one client device whenthe second state variable is in common on the at least one license owner and controller devices, andthe first state variable is in common on the at least one client and controller devices.
1 Assignment
0 Petitions
Accused Products
Abstract
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.
10 Citations
9 Claims
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1. A method of digital rights management for granting access to content owned by at least one license owner device to at least one client device, the method comprising acts of:
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providing on the at least one client device and a controller device a first state variable indicating a membership relation of the at least one client device in a domain; providing on the at least one license owner and controller devices a second state variable indicating an association relation between the at least one license owner device and the domain, granting access to the content owned by the at least one license owner device to the at least one client device when the second state variable is in common on the at least one license owner and controller devices, and the first state variable is in common on the at least one client and controller devices. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for digital rights management for granting access to content owned by at least one license owner device to at least one client device, the system comprising:
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a computer device including a first state variable indicating a membership of the at least one client device in a domain; and a second state variable indicating an association relation between the at least one license owner device and the domain, wherein the access to the content owned by the at least one license owner device is granted to the at least one client device when the second state variable is in common on the at least one license owner device and a controller device, and the first state variable is in common on the at least one client and controller devices.
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Specification