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Re: Cryptography Research wants piracy speed bump on HD DVDs

daemon@ATHENA.MIT.EDU (Taral)
Wed Dec 22 11:43:00 2004

X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
Date: Wed, 15 Dec 2004 11:54:56 -0600
From: Taral <taral@taral.net>
To: cryptography@metzdowd.com
In-Reply-To: <p06110462bde5fab523e0@[68.167.57.91]>


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On Wed, Dec 15, 2004 at 09:29:46AM -0500, R.A. Hettinga wrote:
> The virtual machine players create movie outputs that are artistically
> identical but each one is altered if some minor way. This alteration is
> just the changing of a few bits of data every few seconds, so every 50
> frames or so. And the CR system works such that if ten separate players a=
re
> used in collusion in a copying process, taking samples of frames from eac=
h,
> it will not only identify one of the players, but all of them and they can
> be revoked from all future content.

What stops someone using 3 players and majority voting on frame data
bits?

--=20
Taral <taral@taral.net>
This message is digitally signed. Please PGP encrypt mail to me.
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?

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