[MPlayer-users] Re: how does mplayer circumvent region protected (RPC-2) DVD drives?

[Arpi]

Hi,

> > libdvdcss 1.x (used in mpdvdkit too - note again it isn't our work, mpdvdkit
> > is libdvdcss+livdvdread+some patches together) first try to do the 'legal
> > method', what you described (get disc key, then decrypt title key with disc
> > key). but, if it fails, then it has 2 other methods:
> > 2. crack the title key by knowing the decrypted VOB content (vob has very
> > strict file format, so it can be predicted well). probably it's called
> > ,,known plaintext attack'', i'm not a crypto expert. slow, and sometimes
> > doesn't work.
> > 3. crack the disc key, by building a 64MB (16M 32bit entries) hash table.
> >  -> very very slow, but afaik always work.
> 
> Isn't the disc key methode performed before the title key 
> methode?

no, unless you force it (export DVDCSS_METHOD=disc afair)


A'rpi / Astral & ESP-team

--
Developer of MPlayer, the Movie Player for Linux - http://www.MPlayerHQ.hu