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Georgios Theodorakopoulos
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Computer Communications and Applications Laboratory 2
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BIOGRAPHY
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George Theodorakopoulos is a senior researcher at EPFL working with Prof. Jean-Yves Le Boudec. He received his B.S. at the National Technical University of Athens (NTUA), Greece, and his M.S. and Ph.D. at the University of Maryland, in 2002, 2004 and 2007, respectively.
His research is focused on network security, trust, and distributed algorithms. He has developed game theoretical and algebraic models to formalize intuitive notions about trust. He has received the best paper award at WiSe'04, and the 2007 IEEE ComSoc Leonard Abraham prize with Prof. John S. Baras, his advisor in Maryland.
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RESEARCH PROJECT
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Haggle - A European Union funded project in Situated and Autonomic Communications
EPFL contribution to Haggle
Haggle is a networking project that moves away from end-to-end communication concepts such as end-to-end feedback or acknowledgments for received packets. The focus is on mobile networks with intermittent connectivity, that is, paths to destinations might not exist when the source decides to send data. As a consequence, data will be stored in the network, and moved around by the nodes storing the data, until good opportunities for further forwarding appear.
The aim of Haggle is to design an architecture for forwarding data in these so-called opportunistic networks. My part in Haggle is to build into the architecture robustness against accidental and malicious failures.
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PUBLICATIONS
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Book
J. S. Baras and G. Theodorakopoulos, "Path Problems in Networks," Morgan & Claypool Publishers, Jan. 2010.
[ Details ]
Journal
G. Theodorakopoulos and J. S. Baras, "Game Theoretic Modeling of Malicious Users in Collaborative Networks," IEEE Journal on Selected Areas in Communications (JSAC), Sep. 2008.
[ Details | Full Text ]
G. Theodorakopoulos and J. S. Baras, "On Trust Models and Trust Evaluation Metrics for Ad-Hoc Networks," IEEE Journal on Selected Areas in Communications (JSAC), Feb. 2006.
[ Details | Full Text ]
Conference
R. Shokri, P. Pedarsani, G. Theodorakopoulos, and J.-P. Hubaux, "Preserving Privacy in Collaborative Filtering through Distributed Aggregation of Offline Profiles," 3rd ACM Conference on Recommender Systems, 2009.
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N. Ristanovic, P. Papadimitratos, G. Theodorakopoulos, J.-P. Hubaux and J.-Y. Le Boudec, "Adaptive Message Authentication for Vehicular Networks," ACM MobiCom VANET Workshop, 2009.
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G. Theodorakopoulos, J. S. Baras and J.-Y. Le Boudec, "Dynamic Network Security Deployment under Partial Information," Allerton 2008.
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J. S. Baras, S. Radosavac, G. Theodorakopoulos, D. Sterne, P. Budulas and R. Gopaul, "Intrusion Detection System Resiliency to Byzantine attacks: the case study of wormholes in OLSR," IEEE Milcom 2007.
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G. Theodorakopoulos and J. S. Baras, "Malicious Users in Unstructured Networks," IEEE Infocom 2007.
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G. Theodorakopoulos and J. S. Baras, "A Game for Ad Hoc Network Connectivity in the Presence of Malicious Users," IEEE Globecom 2006.
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G. Theodorakopoulos and J. S. Baras, "A Testbed for Comparing Trust Computation Algorithms," ASC 2006.
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T. Jiang, G. Theodorakopoulos, and J. S. Baras, "Coalition Formation in MANETs," ASC 2006.
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G. Theodorakopoulos and J. S. Baras, "Enhancing Benign User Cooperation in the Presence of Malicious Adversaries in Ad Hoc Networks," IEEE/CreateNet SecureComm 2006.
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G. Theodorakopoulos and J. S. Baras, "Linear Iterations on Ordered Semirings for Trust Metric Computation and Attack Resiliency Evaluation," MTNS 2006.
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G. Theodorakopoulos and J. S. Baras, "Trust Evaluation in Ad-Hoc Networks," ACM WiSe 2004.
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Thesis
G. Theodorakopoulos, "Robust Network Trust Establishment for Collaborative Applications and Protocols," PhD dissertation, University of Maryland, May 2007.
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| Skills |
Network Security,
Trust,
Game Theory,
Algebraic Combinatorics,
Ad-hoc/P2P Networks,
Distributed Algorithms |
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| Mailing Address |
EPFL IC LCA2
BC 254 (Batiment BC)
Station 14
CH-1015 Lausanne, Switzerland
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Engineer