a content rendering device for rendering DRM-protected content, wherein at least one rights specification governs access to DRM-protected content on the content rendering device;

a mobile device having a wireless networking capability and a characteristic, the mobile device being coupleable to the content rendering device;

a DRM client arranged to operate within the content rendering device and which has access to the at least one rights specification governing access to the DRM-protected content, the at least one rights specification being accessible independently of the DRM-protected content and being tied to a first node identifier that is based on the characteristic of the mobile device,

wherein the at least one rights specification is restricted to apply to at least one node identifier,

wherein the DRM client is arranged to retrieve said characteristic from the mobile device coupled to the content rendering device, to generate the first node identifier based on said characteristic, and to check that the first node identifier matches the at least one node identifier to which the at least one rights specification is restricted,

wherein access to the DRM-protected content by the content rendering device is granted subject to the at least one rights specification available to the DRM client and subject to the first node identifier matching the at least one node identifier to which the at least one rights specification is restricted, and

wherein the DRM client is arranged to communicate with a DRM server by way of the wireless networking capability of the mobile device.