Secure Multimedia over Mobile Wireless Networks: Challenges and Solutions

Speaker:	Professor Chang Wen CHEN
		State University of New York at Buffalo
		USA

Title:		"Secure Multimedia over Mobile Wireless Networks:
		 Challenges and Solutions"

Date:		Thursday, 24 February 2011

Time:		4:00pm - 5:00pm

Venue:		Room 4480 (via lifts 25/26), HKUST

Abstract:

It is well known that media data over wireless links is more vulnerable to
illegal access and modification due to their open air access operating
mode. Wireless links are fundamentally different from the wired
communications in several key operation aspects, including limited
bandwidth as well as time-varying and error prone channel conditions. As a
result, conventional secure data communication schemes cannot be readily
applied to secure media over mobile wireless networks. In wireless
networks, transmission errors such as packet loss and bit errors are
inevitable due to ambient interferences and open air operation mode.
Furthermore, media transmission is also fundamentally different from the
generic data communication in that media content integrity, rather than
the data stream integrity, needs to be preserved during the transmission.
For example, when authenticating media for wireless networks, the semantic
meaning of the media data, instead of the entirety of the data, needs to
be verified.

In this talk, various challenges in secure multimedia over mobile wireless
networks beyond reliable transmission will be presented. In particular,
examples in multimedia encryption and multimedia authentication over
wireless links will be discussed in detail. Some contemporary solutions to
these challenges, such as encryption of scalable video and joint
source-channel-authentication design, will also be described to illustrate
that paradigm shift solutions can be developed to meet these great
challenges.

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Biography:

Chang Wen CHEN is a Professor of Computer Science and Engineering at the
State University of New York at Buffalo. Previously, he has been Allen
Henry Endow Chair Professor of Electrical and Computer Engineering at the
Florida Institute of Technology from 2003 to 2007. He was on the faculty
of Electrical Engineering Dept. at the University of Rochester from 1992
to 1996, on the faculty of Electrical and Computer Engineering Dept at the
University of Missouri-Columbia from 1996 to 2003. He also served as the
Head of Interactive Media Group at David Sarnoff Research Labs in
Princeton from 2000 to 2002, managing numerous research projects in video
coding standards and wireless video communications.

He served as the Editor-in-Chief for IEEE Trans. Circuits and Systems for
Video Technology from 2006 to 2009. He has been an Editor for numerous
IEEE Transactions and Journals, including Proceedings of IEEE, IEEE
Journal of Selected Areas in Communications, IEEE Trans. Multimedia, and
IEEE Multimedia Magazine. He has also served as Conference Chair for
several major IEEE and SPIE conferences related to mobile wireless video
communications and signal processing. His current research interests
include reliable and secure multimedia communications over mobile wireless
channels; digital video coding, processing, analysis, and embedded
implementation; medical image analysis and biomedical information
processing; distributed source coding and digital signal processing for
communications; and collaborative signal processing and data aggregation
for sensor networks. His research is supported by NSF, DARPA, Air Force,
NASA, Whitaker Foundation, Kodak, Intel, and Huawei.

He received his BS from University of Science and Technology of China in
1983, MSEE from University of Southern California in 1986, and Ph.D. from
University of Illinois at Urbana-Champaign in 1992. He was elected an IEEE
Fellow for his contributions in digital image and video processing,
analysis, and communications, and elected an SPIE Fellow for his
contributions in electronic imaging and visual communications.