Cryptography Research wants piracy speed bump on HD DVDs

[Marcel Popescu]

> From: owner-cryptography at metzdowd.com [mailto:owner-
> cryptography at metzdowd.com] On Behalf Of Adam Back
> Sent: Wednesday, December 22, 2004 11:48 PM

> I would think the simplest canonical counter-attack would be to make a
> p2p app that compares diffs in the binary output (efficiently rsync
> style) accumulates enough bits to strip the disk watermark, p2p rips
> and publishes.  QED.

Why not the way it happens right now - re-encoding? Few people post DVD
images of movies on p2p networks, and even when they do, I prefer a DivX or
XviD variant. (Much better given my 'net bandwidth.) I strongly doubt
there's any chance of a watermark surviving an unknown re-encoding process
(DivX has dozens of parameters you can change).

Marcel



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