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The following archive was created by hippie-mail 7.98617-22 on Fri Aug 21 1998 - 17:16:49 ADT
Greg Rose (ggr@qualcomm.com)
Wed, 01 Apr 1998 17:55:07 +1000
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.
Hope that helps.
Greg.
Greg Rose INTERNET: ggr@qualcomm.com
QUALCOMM Australia VOICE: +61-2-9743 4646 FAX: +61-2-9736 3262
6 Kingston Avenue http://people.qualcomm.com/ggr/
Mortlake NSW 2137 B5 DF 66 95 89 68 1F C8 EF 29 FA 27 F2 2A 94 8F
The following archive was created by hippie-mail 7.98617-22 on Fri Aug 21 1998 - 17:16:49 ADT