We recently got word of an intriguing hack that lets you bust into an HDMI cable to sniff out the HDMI protocols for interesting data such as control information and the HDCP security keys. Adam over at Aperture Labs put out a great article at his blog showing exactly how to do this. First of all, you’ll need to butcher an HDMI cable by chopping one end off and using a stripper to get at the wires inside. Then, using an HDMI screw terminal board (pictured above) you’ll basically connect the HDMI cable to itself only with the terminal board wired in between. Adam’s article details how to use a continuity tester to figure out which wires to connect with which terminals on the HDMI screw terminal board, and ultimately how to tap into the plethora of information being transferred. It makes the mind spin with all the cool gadgets you could hack up to take advantage of this data!
In the end, Adam has built an HDMI breakout cable that can be used to monitor all the data going through the cable in real time, and of course hack it out of the park from there!
Please be sure to check out the original article for the full run-down of building one of these yourself, and make sure you utilize the comments section if you have any thoughts!