===Biography===
Christopher has some early 2000's videos on youtube from Black Hat and DEFCON and then disappears until about 2019 when some newer video's appeared. His work reverse engineering and working with bare silicon is worth watching for anyone interested in this level of security analysisreverse engineering.
He seems to be most well known for his work with DirecTV and NDS which led to legal troubles. This could be the reason he disappeared from the public for so long. Below is a connection of videos and articles.