Interesting Tim O'Reilly article. (OT)

From: Eric Smith <>
Date: Sat Dec 14 00:04:01 2002

"Sean 'Captain Napalm' Conner" <> wrote:
> If Johansen wanted to create copies of DVDs he did *not* have to break
> CSS---all he needed to do (or anyone needs to do) is make a bit-for-bit
> copy of the DVD in question and it will play in any DVD player as a
> normal DVD.

That would have been even more difficult than breaking CSS, because the
DVD-ROM drives will NOT give you all of the encrypted data unless you
successfully authenticate. They will simply return errors (and no data)
for some (but perhaps not all) of the encrypted blocks. I don't recall
whether reading the encrypted data requires just the negotiation for the
disc key, or whether the title key is involved as well.

Received on Sat Dec 14 2002 - 00:04:01 GMT

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