#3417 musashi9:
Great stuff. What did the protection do? Did it check for something on the original disc?
It basically would read an encrypted sector from the disc, that was written on a part non-writable by dvd burners. This sector, after decryption would represent a table with a series of challenges/responses that would be issued to the dvd player, which in turn would compute the responses and compare them to the responses in the table (I think (some of the) responses were again calculated based on data on non burnable sectors). If everything was fine it would ‘unlock’ the main game partition and boot it.
All data communication between xbox and dvd player was encrypted and xbox memory was of course also encrypted and things like the security sector etc were signed,but it wasn’t too hard actually to decrypt everything.
We never released the crack itself but did document everything on xboxhacker so people could do it themselves if they wanted to. I’m really not sure where that left us from a legal standpoint, but luckily we never were tested in that regard 😉