Re: [clueless] cryptography in DVD? Re: DVD-ROM problems

From: Alan Cox (alan@lxorguk.ukuu.org.uk)
Date: Fri Feb 11 2000 - 08:49:49 EST


> > Ok, so it authenticates fine at least. I'd like to see the errors that
> > get dumped to the logs at this point (dmesg), this might not be a
> > plain I/O error.
>
> Just out of curiosity, what is that? You need cryptography for your
> DVD to work? What is it good for? Why does linux need to know if drive
> knows some secret numbers?

DVD disks have a challenge/response unlock mechanism and then (badly)
crypt the data. Thats what the whole DVD decss row is about

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