Output Content Protection (DRM) and Windows Vista
by JIMMY PALMER
DRM Blog, publication date: 26 May 2006
"Once again the consumer is the one paying for DRM and most people will never know about it. But the fun does not stop there. “If you are a graphics chip manufacturer”, it is your responsibility as one of the trusted links in the PC chain to make sure that you are not selling your chips to any rogue elements who are going to make “hacker-friendly graphics boards”. Logically, according to Microsoft, the easiest way to do this is to ensure that your GPU performs encryption in the chip itself. Apparently, it is also important that both the driver certificate and the private key both be “obfuscated”. In fact, Microsoft has come up with an obfuscation tool that they use for their Certified Output Protection Protocol (COPP). It is assumed that the driver makers will use this same tool when obfuscating their key."