HDCP (High-bandwidth Digital Content Protection) requires an initial handshake to authenticate the connection and ensure content protection. This handshake occurs only when the hotplug circuit is first completed between the source and the display. This process ensures that both devices support HDCP, allowing the secure transmission of protected content. Once established, the HDCP link does not repeatedly handshake unless the connection is reset.
CTS Technology Specialist Reference
The CTS curriculum on digital video interfaces covers the HDCP handshake process and explains that it occurs upon initial connection to prevent unauthorized copying and redistribution of content.
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