DisplayPort Multiplexing PCIe Bus for Bandwidth and Encryption

The DisplayPort interface is designed to serve multiple functions: it provides digital video output, extends PCIe bus connectivity to peripheral devices, and implements comprehensive digital content protection. By combining these functions in a single interface standard, the patent achieves adaptability for future bandwidth requirements while maintaining reliable content protection through 128-bit encryption keys and AES encryption.

The patent promotes a single universal DisplayPort interface that can handle various display requirements through its configurable lane structures. The interface supports different resolutions and bandwidth requirements by activating appropriate numbers of lanes (2 or 4), eliminating the need for multiple different video standards and simplifying installations.

The patent merges PCIe bus connectivity and video signal transmission into a single DisplayPort cable connection. By multiplexing both video data and PCIe bus data over the same physical interface and cable, the solution achieves improved peripheral connectivity while simplifying cable management, as users only need to manage the DisplayPort cable rather than separate PCIe and video cables.

The DisplayPort interface performs encryption key exchange and authentication procedures during the link training phase, which occurs before actual video data transmission begins. This preliminary action ensures that security handshaking and 128-bit key establishment are completed in advance, minimizing processing overhead during normal operation while maintaining enhanced digital content protection.