> 99% of all Xbox 360's here in Uruguay are hacked
as in they flashed the disc reader's firmware to have it say 'yes, this is a legit disc', which does not invalidate the fact that the code on the disc is signed.
> What do you mean by bulletproof?
bulletproof as in even partial access to the hardware to execute random, sideloaded, unsigned code on the CPU is extremely involved, if at all possible.
I can see that they must have raised security A LOT, but it seems it hasn't stopped the pirates.