That would still be some progress in my opinion :) Up untill now Raz has had us believe that each game or revision has an entirely different encryption key.

> > Thats exactly what I was thinking. There would be no point in making an xor
> to
> > run previously xored program roms run in a different region. But on the other
> > hand, I'd imagine some knowledge of the encryption is needed to run unxored
> > program roms with a hacked xor. It would be nice if someone in the know would
> > comment with a little more than just "nope".
>
> Calling it a hacked XOR could mean anything even just a change to the rom
> checksum. Which would probably be required.
>
> Understanding the encryption wouldn't be required just knowing how the xor's are
> applied to make changes to code.
>
> >
> >
> > >
> > > This line makes me think other wise.
> > >
> > > "these new XOR's contain incorrect information in relation to what the real
> > > encryption would return for many addresses when compared to real hardware."
> > >
> > > If they were just changing code to alter the region it wouldn't affect the
> > game.
> > > Other than the normal problems of using region codes with some games. I
> think
> > > what he's getting at is some clone games may use the same encryption key.
> And
> > > since the code would be similar too the XOR works. But different revs. or
> > > regions will still have code changes that would be incorrect when you apply
> an
> > > XOR not made for it.
> > >
> > > If this is true it leads me to speculate that the key could be quite small
> if
> > > there's a lot of games that work like this. The remaining games could be
> brute
> > > forced easily if the algorithm was known.
> > >
> > > Consider this why would someone bother hacking XOR's to do a region switch
> > when
> > > most CPS2 emu's support region switching. And why would Raz comment on
> > something
> > > that pathetic? Really no one would care.
> > >
> >
>