[HGI-News] HGI-Seminar am Mittwoch, 21.07.2004

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

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		   		 Jean-Pierre Hubaux
			  		 EPFL		 
            	  
      	 "Two Security Questions in Wireless Networks"

               Mittwoch, 21.07.2004, 11:00 Uhr. IC 4/39,

Abstract

Wireless communication systems have become part of our daily life, and
yet several basic security questions still need to be addressed. In this
talk we will provide two examples to illustrate this concern, and we
will describe the solutions we propose. 

The first example is in the mundane framework of WiFi hotspots: we will
show that the increasing programmability of IEEE 802.11 network adapters
makes it very easy for a greedy user to deviate from the MAC protocol in
order to increase his own bandwidth at the expense of the other, well-
behaved users. We will also describe our solution to this problem,
called DOMINO, which consists in a piece of software to be installed at
each Access Point. DOMINO is protocol compliant and is able to detect
and identify a cheater in a matter of seconds. DOMINO is described at
http://domino.epfl.ch

The second is related to secure positioning. A number of techniques have
been proposed over the last years to allow wireless devices to position
themselves in absolute coordinates and with respect to each other.
However, very little work has been done to secure these operations. We
will show the vulnerability of the existing solutions to a number of
attacks, and we will propose a solution based on a distance bounding
protocol.
 

 


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VORTRÄGE IM SS 2004:
(Abstracts sind hier:
 http://www.crypto.ruhr-uni-bochum.de/ge/seminar/hgi_sose04.html)
 
 19.04.2004, Marc Stevens, ITSC - RUB, 13.00 c.t. IC 4/39,,
 "Arithmetic on Hyperelliptic curves of genus 1 and 2"

 26.04.2004, Jonathan Hammell, COSY - RUB, 13.00 c.t. IC 4/39,
 "Recognition in a Low-Power Environment"

 03.05.2004, Kai Schramm, COSY - RUB, 13.00 c.t. IC 4/39,
 "Internal Collisions in AES"

 17.05 Christian Tobias, JLU Gießen, 13.15 hrs. IC 4/39,
 "Design und Analyse kryptografischer Bausteine auf nicht-abelschen
Gruppen"
 
 24.05 Jamshid Shokrollahi, Uni Paderborn, 13.15 hrs. IC 4/39,
 "Unifying structures for polynomial and normal bases"

 7.06 Lars Pontow, COSY Group -RUB, 13:15 hrs. IC 4/39,
 "Elliptic Curve Cryptography as a Case Study for Hardware/Software
Codesign"

 14.06 Kerstin Lemke, COSY Group -RUB, 13.15 hrs. IC 4/39,
 "DPA on n-bit sized Boolean and Arithmetic Operations and its
application to IDEA, RC6 and the HMAC-Construction"

 16.06 Eike Kiltz, Lehrstuhl Mathematik und Informatik -RUB, 13:30 hrs.
NA 1/58 (Friedrich-Sommer Raum)
"Secure Constant Round Multi-Party Computation for Equality, Comparison
and Bits"

 21.06 Howon Kim (ETRI-Korea), COSY Group -RUB, 13.15 hrs. IC 4/39,
"Hyperelliptic Curve Coprocessors on FPGA"

 28.06 Werner Schindler, BSI, 13:15 hrs, IC 4/39 	
"Über die Modellierung und Analyse physikalischer
Zufallszahlengeneratoren"

 5.07 Mark Manulis, NDS Group -RUB, 13:15 hrs. IC 4/39,
 "Pseudonym Generation Scheme for Ad-Hoc Group Communication" 

 19.07 Magnus Daum, ITSC -RUB, 13:15 Uhr. IC 4/39 
"Angriffe auf Hashfunktionen mit Hilfe spezialisierter 
  Lösungsalgorithmen"

 21.07 Jean-Pierre Hubaux, EPFL, 11:00 Uhr. IC 4/39
"Two Security Questions in Wireless Networks"

 26.07 John Malone-Lee, University of Bristol, 13:15 Uhr. TBA
"A General Construction for Simultaneous Signing and Encrypting" 

 

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M.Tech. Sandeep Kumar
Chair for Communication Security
Dept. of Electr. Eng. & Information Sciences
Ruhr-University Bochum
44780 Bochum, Germany
URL: www.crypto.rub.de