Another example: The copy protection scheme for Blu-ray Discs (AACS) is actually an open standard. You can download the PDF specification from their website rig

Another example: The copy protection scheme for Blu-ray Discs (AACS) is actually an open standard. You can download the PDF specification from their website right now. But getting your actual unique device key? You are instantly in boiling water if you steal one from another manufacturer. Or another example: There is a lawsuit right now about whether YouTube has legally-protected “technological protection measures,” even though YouTube doesn’t use Widevine, FairPlay, etc. The hope is to get YouTube-DL-Like programs found a violation this way. If the movie industry is seriously embroiled in a lawsuit about whether freaking YouTube has TPMs (and they think they could win), an AES-128 key from Nintendo used for encrypting games is probably a slam dunk. > In the original post: “whether Nintendo's broken DRM actually counts as an effective copyright protection measure” Woah, woah, woah. Courts have been clear as daylight that somebody breaking DRM, or the broken status of DRM, has zero effect on legality. DVD has the weakest protection ever (40-bit keys), has been broken since 1999, but the Library of Congress still has their meetings for arguing about what DMCA exceptions to grant for the next three years. And DVD ripping software companies have been sued and lost repeatedly. It’s still a crime to break into a private area secured by a 60-year-old rusted lock.