Speaker:
Dr. Guang Gong
University of Waterloo
Title:
Monitoring-Based Key Revocation Schemes for Mobile Ad Hoc Networks
Date:
Friday, February 20, 2009
Time:
2:30 pm - 3:30 pm
Location:
DC 1304
This seminar is part of a series of invited talks
(
Nortel Networks
Distinguished Seminar Series) and is
co-sponsored by the
Nortel Networks Institute
for Advanced Information Technology at the University of Waterloo,
and
IEEE Information Theory
Society, Kitchener-Waterloo Chapter.
For further information, please
contact
Amir Khandani.
Abstract:
A primary security challenge in such networks is the likelihood of
node compromises caused by weak physical protection and hostile
environments. As a result, key revocation is essential. In this
talk, recent results on key revocation problems in mobile ad hoc
networks (MANETs) will be presented. Two new fully self-organized key
revocation schemes, which can be used in any pairing-based Identity Based
Cryptography (IBC) scheme, adaptable to certificate revocation schemes in
Public Key Infrastructure (PKI) solutions and secret key-based schemes
in MANETs will be introduced. In the first scheme, nodes monitor their
neighbors, securely propagate their observations, and revoke keys, once
designed threshold accusations are received. The solution completely
thwarts many attacks including Sybil, impersonation, and replay
attacks. In the second scheme, the statistical Dirichlet multinomial
model is introduced to key revocation processes. Each node keeps track
of three categories of behavior, i.e., good, suspicious and malicious
behavior. Differentiating between suspicious behavior and malicious
behavior enables nodes to make multilevel responses by either revoking
keys of malicious nodes or ceasing the communication with suspicious nodes
for some time, to gather more information for making further decision.
Biography:
Guang Gong received a B.S. degree in Mathematics in 1981, an M.S. degree
in Applied Mathematics in 1985, and a Ph.D. degree in Electrical
Engineering in 1990, from Universities in China. She received a
Postdoctoral Fellowship from the Fondazione Ugo Bordoni, in Rome, Italy,
and spent the following year there. After returning from Italy, she
was promoted to an Associate Professor at the University of Electrical
Science and Technology of China. During 1995-1998, Guang worked with
several internationally recognized, outstanding coding experts and
cryptographers, including Dr. Solomon W. Golomb, at the University of
Southern California. Guang joined the University of Waterloo, ON. Canada
in 1998, as an Associate Professor in the Dept. of Electrical and
Computer Engineering in September 2000. She has been a full Professor
since 2004. Dr. Gong's research interests are in the areas of sequence
design, cryptography, and communications security. She has authored or
co-authored more than 180 technical papers and one book, co-authored
with Dr. Golomb, entitled, 'Signal Design for Good Correlation for
Wireless Communication, Cryptography and Radar', published by Cambridge
Press in 2005. Dr. Gong serves/served as Associate Editors for several
journals including Associate Editor for Sequences for IEEE Transactions on
Information Theory, and sat on a number of technical program committees
and conferences. Dr. Gong has received several awards including the
Best Paper Award from the Chinese Institute of Electronics in 1984,
Outstanding Doctorate Faculty Award of Sichuan Province, China, in 1991
and the Premier’s Research Excellence Award, Ontario, Canada, in 2001.
