• home
• current students
• graduate
• events

Presenter: Alireza Movahedian
Supervisor: Dr. Michael McGuire

Date: Wed, May 8, 2013
Time: 11:00:00 - 00:00:00
Place: EOW 430

ABSTRACT

Abstract:

Secret key generation using wireless channel characteristics is of growing interest and applicability in mobile communication systems. The gains of the radio channel between the legitimate users are estimated to provide a source of common randomness and generate secret keys. The commonality comes from the fact that the channels observed by the two ends of communication are the same. Moreover, the common randomness is unique to the transmitter and receiver and, thus, is not available to any potential eavesdropper. The secret key capacity of this source of randomness is of practical importance in secure high-data rate systems. The key capacity is directly related to the channel variation rate: a faster varying channel gives a higher key capacity. The channel changing rate however, is a double-edge sword. While a faster varying channel may offer higher key generation capability, its estimation is more computationally demanding. Therefore, the estimation error has to be considered as a prominent factor in the design and analysis of key generation systems.

This seminar concerns design and analysis of secure mobile systems over frequency-selective, fast fading channels, seen in vehicular wireless networks. In particular, the problem of secret key generation from radio channel characteristics as a source of common randomness is explained. The higher rate of channel variation can potentially provide longer keys, thereby, more secure communication.