Patent ID: 8605097

Claim:
A computer-implemented method for determining whether display content should be delivered to a display device via a link connecting the display device to a graphics subsystem at a display attachment location residing within the graphics subsystem, the method comprising: evaluating an enumerated list received from the graphics subsystem to determine whether the display device supports an encrypted display mode; if the display device does not support an encrypted display mode, or if the display device does support an encrypted display mode, but encryption for the link is not enabled, then: verifying that the link is not accessible by users, verifying that the display device is identifiable with a key selection vector that is unique to the graphics subsystem, and proceeding to deliver the display content to the display device via the link; or if the display device does support an encrypted display mode, and encryption for the link is enabled, then: obtaining and validating the status of the link, confirming that no key selection vectors unique to the link have been revoked, and proceeding to deliver the display content to the display device via the link.