HDCP or High Definition Content Protection is the content protection scheme of the HDMI standard.

HDCP or High Definition Content Protection is the content protection schemer of the HDMI standard. HDCP operates by transmitting video and audio in an encrypted form. In theory, only authorized devices with HDCP decode keys should be able to decrypt the encrypted content. Since devices are only given an authorized key when certified to protect the content, it limits the ability of content to be copied. The encrypted signal is not sent if a secure path can not be verified from the HDCP source to an HDCP compatible end point (such as a TV.)