DVDs have two forms of protection, one in the analog world, and the other in
the digital world. Both are EASILY breakable! The digital protection, known
as Content Scrambling Sytem, uses 400 40-bit keys to encrypt the .VOB video
stream. Each software/player manufacturer has a decryption key. You can copy
the video from a DVD to yuor hard drive, but you wont be able to watch it
unless you use DeCSS (actually, first developed for Windows, because Linux
didnt have UDF support at the time). The analog version, is, of course,
Macrovision, added by the hardware of the player, and can usually be
disabled.
And about the MD player? That's what ya get for buying Sony! tsk tsk
-Rob
----- Original Message -----
From: "." <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, March 27, 2001 10:24 PM
Subject: MD: . dvd copyright/fragile MD players


>
> > >I don't know if they use SCMS, but they use something. You can not copy
> > >DVDs onto most VHS recorders these days because they're protected.
> >
> > That's macrovison man. A totally analogue copy protection scheme
> > that's been
> > around since the late 80s at least, not just on DVD, but VHS as
> > well. It is
> > a bunch of gobly gook that resided in the vertical blanking buffer on
old
> > VHS tapes that screws up the signal for copies, but not laserdisc (since
> > that part of the signal is used for time info). In DVDs it is actually
> > generated by the hardware (I assume) since it's possible to turn
> > it on and
> > off.
>
>
> Macrovision is one copyright protection method, but there are DVD-specific
> copyright protection schemes. There has to be. They're not going to just
> stay with something that was originally designed for VHS tapes 10 years
ago.
> But I could be wrong.
>
> Programs that bypass copyright protection (not all DVDs are copyright
> protected by the way) were originally designed for the Linux platform.
They
> couldn't play DVDs on their computers precisely because of copyright
> protection. And so some people wrote software to get around it so they
could
> watch DVDs they bought on their Linux boxes. I guess it was the natural
> progression for it to move to PCs.
>
> Anyway. Today my portable minidisc player wouldn't play. I ejected the
disc
> and put it back and then it played. I hope stuff like this doesn't happen
> again, but that's what the extended warranty is for. Does Sony make their
> players like this on purpose so they shift more units? They look so
fragile.
>
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