Lecture
Physical Layer Authentication
Speaker: |
Prof. John
S. Baras, Institute for Systems Research and Department of Electrical and Computer Engineering and Department of Computer Science Fischell Department of Bioengineering University of Maryland College Park |
Date: |
Wednesday, 30 July 2008 |
Time: |
15:00-16:30 |
Location: |
"Mediterranean Studies" Seminar Room, FORTH. Heraklion, Crete |
Host: |
M. Papadopouli |
Abstract: |
Authentication is the process where claims of identity are verified. Most
mechanisms of authentication (e.g., digital signatures and certificates) exist
above the physical layer, though some (e.g., spread spectrum communications)
exist at the physical layer often with an additional cost in bandwidth. We
introduce a general analysis and design framework for authentication at the
physical layer where the authentication information is transmitted concurrently
with the data. By superimposing a carefully designed secret modulation on the
waveforms, authentication is added to the signal without requiring additional
bandwidth, as do spread spectrum methods. The authentication is designed to be
stealthy to the uninformed user, robust to interference, and secure for
identity verification. The tradeoffs between these three goals are identified
and analyzed in block fading channels. We describe further extensions to OFDM
and multicarrier wireless devices. Finally, both simulation results and
experimental results from laboratory implementation of these new schemes are
given that demonstrate the potential of this new authentication technique. |
Bio: |
John S. Baras, Lockheed Martin
Chair in Systems Engineering B.S. in Electrical Eng. from the Nat. Techn. Univ. of Athens, Greece, 1970; M.S. and Ph.D. in Applied Math. from Harvard Univ. 1971, 1973. Since 1973 with the Electrical and Computer Engineering Department, and the Applied Mathematics Faculty, at the University of Maryland College Park. Faculty member in the Department of Computer Science and Fischell Department of Bioengineering. He was the founding Director of the Institute for Systems Research (ISR) from 1985 to 1991. Since 1991, has been the Director of the Maryland Center for Hybrid Networks (HYNET). Fellow of the IEEE and a Foreign Member of the Royal Swedish Academy of Engineering Sciences. Received the 1980 George Axelby Prize from the IEEE Control Systems Society and the 2006 Leonard Abraham Prize from the IEEE Communications Society. Professor Baras' research interests include control, communication and computing systems. Email: baras@isr.umd.edu, Web page: http://www.isr.umd.edu/~baras/ |