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The following archive was created by hippie-mail 7.98617-22 on Fri Aug 21 1998 - 17:16:49 ADT
Bruce Schneier (schneier@counterpane.com)
Wed, 01 Apr 1998 08:21:47 -0600
At 05:55 PM 4/1/98 +1000, Greg Rose wrote:
>Nicholas Charles Brawn writes:
>>I seem to recall that a digital watermarking product was released a short
>>while ago, and a succesful attack against it was published soon
>>afterwards. Can anyone remember the attack I am referring to? And
>>if so could you point me towards further information.
>
>Ross Anderson at Crypto showed all sorts of nifty
>hacks in the rump session which defeated
>watermarking... but I don't know whether any of
>it was subsequently published. The one I remember
>most clearly was deleting a column of pixels, and
>duplicating another column a bit further across.
>
Ross is presenting his paper at the Information Hiding Workshop this
month. I believe Springer-Verlag will be publishing the proceedings, but
you can check his home page for the paper.
Bruce
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Bruce Schneier, President, Counterpane Systems Phone: 612-823-1098
101 E Minnehaha Parkway, Minneapolis,MN 55419 Fax: 612-823-1590
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The following archive was created by hippie-mail 7.98617-22 on Fri Aug 21 1998 - 17:16:49 ADT