CATEGORY 10 - High-bandwidth Digital Content Protection (HDCP)
HDMI's digitalness posed a problem for the entertainment industry. it would allow anybody to make professional quality bootlegs of your favorite movies or television shows without having major hardware and software. To the rescue, the intellectual property posse. well, actually intel and HDMI.
They developed hdcp, which stands for high-bandwidth digital content protection. You could describe it as an encryption handshake between your bluray player and your TV that allows for transparent delivery of copyrighted audio and video but discourages one from opening up their own sidewalk stand selling the latest movies.