[HGI-News] HGI Seminar: Yvo Desmedt on Monday, November 10

[hgi-news at lists.ruhr-uni-bochum.de]

Dear all: It is our honor to have Prof. Yvo Desmedt giving another talk in
our seminar series. As always, everybody is welcome. Please note that this
talk is in the IC ("Elektrotechnik") building.

Regards, Christof Paar

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                      Yvo Desmedt

             Florida State University, USA

          Montag, November 10, 13:15 Uhr, IC 4/39

  Cryptanalysis of Several of the UCLA Watermarking Schemes for
  Intellectual Property Protection of Digital Circuits/Designs


ABSTRACT:

We analyze four recently proposed watermarking schemes for intellectual
property protection of digital designs. The first scheme watermarks
solutions
of a hard optimization problem, namely the graph coloring problem. The
remaining three schemes belong to a family of techniques for watermarking
digital circuits on programmable hardware. They were referred to as
constraint-based watermarking. All of these schemes are different from usual
image and audio watermarking in that they must maintain the correctness of
the
watermarked objects. Therefore their watermarks cannot be embedded in the
form
of small errors as usually done in audio and visual watermarking. Though
similar constraint-based schemes existed for watermarking software, these
schemes are the first ones applied to protect hardware designs. In this
lecture,
we apply a novel method to break the first of these schemes. We show how to
modify a watermarked object in such a way that every signature strings can
be
extracted from it. Thus anyone can claim ownership of the object, yet leave
no
traces of who leaked the object.  According to our best knowledge, this
method
is new and it may be of its own interest. In the other three watermarking
schemes, we show how to locate and to remove the watermark embedded in the
object, without knowing the secret key used in the embedding.

This presentation is based on joint work with Tri V. Le.
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BIOGRAPHIE:
Yvo Desmedt received his Ph.D. (Summa cum Laude) from the University of
Leuven, Belgium (1984). He is presently a professor at Florida State
University (Computer Science) and a visiting professor of Information
Security at Royal Holloway, University of London. His interests include
cryptography, network security and computer security. He has authored
more than 100 papers in international conferences and journals. He was
program chair of PKC (Public
Key Cryptography) 2003, the 2002 ACM Workshop on Scientific Aspects of
Cyber Terrorism and Crypto '94. His first paper that described a
potential cyberterrorism scenario dates back to 1983. He is an editor of
the Journal of Computer Security and of Information Processing Letters
and is a director of the International Association for Cryptologic
Research.

Yvo Desmedt is ranked as the 2nd most prolific author (out of 1165
researchers) in Crypto/Eurocrypt. He has given invited lectures at
several conferences and workshops in 5 different continents and more
than 100 invited lectures for industry and academia. He is a recipient
of the Society of Worldwide Inter-bank Funds Transfer (SWIFT) award.

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-------------------------------------------
           Horst Görtz Institut
für Sicherheit in der Informationstechnik
     an der Ruhr-Universität Bochum

    http://www.hgi.ruhr-uni-bochum.de
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