DVD player keys

[doomDVD]

ive noticed that most decrypters today have a huge list of players keys that are used in conjuctions with the vob file data for the de-mangling function.

what i would like is how to you get the player key from a drive. the huge list i found must have been compiled somehow.

Best regards
doomDVD.

[fu2k]

You can't (easily) get the player key from a drive or DVD. It's supposed to be a secret that only a particular DVD player application knows. And if the crypto was done properly, it would have stayed this way. (Un)fortunately the DVD crypto was weak and easily broken, allowing the knowledge of a DVD disk key to be used to determine a set of possible player keys for that disk. (See FairUse source, function Css::_KeyDiscovery(...) for an example). With just a handfull of DVDs it's possible to screen out false key "hits", and produce a complete list of player keys.

Note 1: You'll have to delve deeply into the crypto to see how this attack works.

Note 2: The keys and algorithms used by FairUse may appear different to that of other decryptors, due to the nature of independent development. However, the list of player keys will be isomorphic with that of other decryptors that use this same technique.

[doomDVD]

ok thats great fu2k, ill will now download the code.

thanx again.