Boing Boing: Investigative blogger picking at secret "A-Hole" technology:
Kathryn Cramer, an investigative blogger, has begun to publish the results of her research into VEIL. VEIL is a technology that the entertainment industry has proposed to turn into a legal requirement for all devices capable of turning an analog signal into a digital one: cameras, recorders and mics of all kinds, in other words. This is to "plug the analog hole."
No one will say how VEIL works, though. As Ed Felten discovered: if you contact the VEIL people and ask for an explanation of how their magic watermarking tech works, they'll charge you $10,000, make you sign a non-disclosure, and then refuse to tell you how the encoding works anyway (they will explain decoding though).