"On September 6th 2000, Mr Leonardo Chiariglione, the Executive
Director of the SDMI group, published an open letter to the digital
community, where he invited hackers to try to break the
technologies developped by several members of the SDMI group."
"We have accepted the challenge and eventually succeeded in
defeating all of the watermarking schemes that were proposed. The
attacks we performed against those four schemes were fairly
different in their level of precision. Two of the attacks were
"random", another was "directed" and the last one was
"On this site we present an overview of the hackSDMI challenge
and a detailed analysis of our surgical attack. We will add
analysis of the other technologies as soon as we manage to mount
surgical attacks against them."
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