HDCP, or High-bandwidth Digital Content Protection, is a technology developed by Intel to protect digital audio and video signals from being illegally copied. It applies to high-bandwidth digital signal interfaces such as DVI, HDMI, DP, UDI (Unified Display Interface), and GVIF (Giga-bit

Video Interface).

HDCP is designed to prevent HDCP-encrypted content from being played on unauthorized devices. Before sending signal data at the signal end, the signal device will check whether HDCP has authorized the receiver to obtain the right to receive data. It will only send encrypted signal data after confirming that it is a legal device.

To manufacture devices that can play HDCP-protected content, manufacturers must obtain patent licenses from Intel's subsidiary DCP-LLC (Digital Content Protection LLC), pay annual fees, and meet various conditions, such as the device cannot copy protected content or transmit protected content to other unauthorized devices.

With the iteration of HDCP versions, its version has been updated to version 2.3. Currently, the most common devices still support versions 1.4 and 2.2.

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