Felten: CGMS-A + VEIL = SDMI? [LWN.net]

Ed Felten is looking at the copy protection technologies mandated by the proposed "analog hole" law in the U.S. "The second technology, VEIL, is a watermark that is inserted into the video itself. VEIL was originally developed as a way for TV shows to send signals to toys. If you pointed the toy at the TV screen, it would detect any VEIL information encoded into the TV program, and react accordingly. Then somebody got the idea of using VEIL as a 'rights signaling' technology. The idea is that whenever CGMS-A is signaling restrictions on copying, a VEIL watermark is put into the video."

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