eWeek: Cryptography Guru Paul Kocher Speaks Out
Bill Frantz
frantz at pwpconsult.com
Wed Apr 30 17:06:40 EDT 2003
At 11:20 AM -0700 4/30/03, Nomen Nescio wrote:
>Or is it possible that our technical analyses are mistaken, and that
>it is actually possible to program devices to watermark the content
>they play in such a manner that the marks can't be practically removed?
>If so, what is the secret?
I am always suspicious of "impossible" statements and "proofs". After
attending last weeks EE380 on Real-Time Watermarking systems
<http://www.stanford.edu/class/ee380/Abstracts/030423.html>, I think it may
be possible to add multiple watermarks, with enough redundancy to survive
the combination of a large number of copies. The need for a large number
of copies will work against the casual "file sharer".
Given that the above is possible, the idea that the player watermarks its
output might actually act as a plug to the "analog hole". Moral of the
story: If you are going to share, buy your player with cash in a remote
city.
Cheers - Bill
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Bill Frantz | Due process for all | Periwinkle -- Consulting
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