Date: Fri, 25 Sep 1998 15:37:36 -0400 (EDT) From: "Charles M. Hannum" <root@ihack.net> To: Doug Rabson <dfr@nlsystems.com> Cc: current@FreeBSD.ORG Subject: Re: Quake-client on FreeBSD-3.0 ?? Message-ID: <199809251937.PAA16528@lunacity.ne.mediaone.net>
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The DVD region coding has absolutely nothing to do with encryption. It's just a random bit field that decoders happen to pay attention to. What you're referring to is the Content Scrambling System, which is a protocol that negotiates a session key between the reader and the decoder, via the host CPU, using a proprietary hash algorithm. If CSS is enabled on a title (a subset of a disc), the reader will refuse to read that title until the CSS negotiation has been successfully completed. Officially, you have to pay 5 kilobucks to Matsushita and sign a bunch of NDAs to get the CSS spec. It's almost certainly possible to reverse-engineer it from a software decoder implementation (such as the one that ships with some Compaq desktops), but I have yet to see anyone publish the results of such an effort. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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