Faculty of Engineering and Natural Sciences
Wireless Physical Layer Security: An Information Theoretic Approach
Onur Ozan Köylüoğlu
Abstract: We are in the midst of wireless revolution, and increasing demand continues for wireless applications. This explosive growth, of wireless communications and services, inevitably renders security into a challenging quality of service constraint that must be accounted for in the network design. The state of the art methods in combating the security threats are usually founded on cryptographic approaches. These techniques typically assume limited computational resources at adversaries, are usually derived from unproven assumptions, and most of the time do not offer a measurable security notion.
In this talk, we design secure systems based on information theoretic principles. This approach allows us to eliminate the aforementioned limitations of the cryptographic techniques at the physical layer of communication systems. We focus on secrecy capacity of elemental networks, secure rate scaling for large networks, and code design for information theoretic security. Our results are encouraging in the sense that a) interference can be exploited to enhance security, b) not only small sized networks, but also large networks can achieve information theoretic security, c) there exists practical coding schemes achieving secrecy for a fairly large set of channels, and d) physical layer security can be implemented together with higher layer cryptographic protocols, and hence, allows for cross-layer security solutions.
Biography: O. Ozan Koyluoglu received the B.S. degree in electrical and electronics engineering from Bilkent University, Ankara, Turkey, in 2005 and the M.S. degree in electrical and computer engineering from the Ohio State University, Columbus, OH in 2007. He is currently a Ph.D. candidate and Presidential Fellow at the Ohio State University and a research colloborator at Alcatel-Lucent Bell Labs, Holmdel, NJ.
He is a recipient of the Ohio State University University Fellowship Award (2005) and the Ohio State University Presidential Fellowship Award (2010).
September 30, 2010, 13:40, FENS G035