Minho Shin recently earned his Ph.D degree in Computer Science from
the University of Maryland in November 2007. His graduate research
focused on the performance and the security of wireless networks. He
received a B.S. degree in Computer Science and Statistics from the
Seoul National University, Korea, in 1998 and a M.S. degree in
Computer Science from the University of Maryland at College Park in
2003. He joins us as a Post-Doctoral Research Fellow with David Kotz
in the ISTS-sponsored MetroSense project.
The CMC is launching a new research project: Data Assurance in Medical Sensor Applications.
We expect that wearable, portable, and even embeddable medical
sensors will enable long-term continuous medical monitoring for many
purposes, such as patients with chronic medical conditions (such as
the recently announced blood-sugar sensors for diabetics), people
seeking to change behavior (e.g., losing weight, or quitting smoking),
or athletes wishing to monitor their condition and performance. The
resulting data may be used directly by the person, or shared with
others: with a physician for treatment, with an insurance company for
coverage, or by a trainer or coach. Such systems have huge potential
benefit to the quality of healthcare and quality of life for many
people.
Since the sensor data may be gathered through a patient's mobile
device (such as a mobile phone), a wireless network, and the Internet,
there are many opportunities for the sensor data to be tampered or
otherwise inaccurate. How can we assess confidence in sensor data? How
can we present that level of confidence, in context, with the sensor
data? This project will develop methods to assess confidence in
medical sensor data.
Funded by Intel University Research Council.
People: David Kotz, and students TBD.
Libo Song, grad student in CMC projects, departs for Bloomberg
All our best wishes to Dr. Libo Song, who defended his Ph.D thesis
last month and days later started his new job at Bloomberg in
NYC. Good luck, Libo!
Libo's dissertation will be added to the CMC web site once final
revisions are complete, in a month or so. Below is the abstract of his
dissertation:
Evaluating Mobility Predictors in Wireless Networks
Handoff prediction in wireless networks has long been considered
as a mechanism to improve the quality of service provided to mobile
wireless usages. Most prior studies for the performance of prediction
techniques, however, were based on theoretical analysis, simulation
with synthetic mobility models, or small wireless network traces.
We tackle the problem by using traces collected at a large
production wireless net-work to evaluate several major families of
handoff-location prediction techniques (Markov, LZ-based, PPM and SPM
predictors), a set of handoff-time predictors (Markov, Moving Average
and CDF predictors), and a predictor that jointly predicts handoff
location and time. We also propose a fallback mechanism, which uses a
lower-order predictor whenever a higher-order predictor fail to
predict.
We found that low-order Markov predictors, with our proposed
fallback mechanisms, performed as well or better than the more
complex and more space-consuming compression-based handoff-location
predictors. Although our handoff-time predictor had modest prediction
accuracy, in the context of mobile voice applications we found that
bandwidth reservation strategies can benefit from the combined
location and time handoff predictor for significantly reducing
call-drop rate without significantly increasing the call-block rate.
We also developed a prediction-based routing protocol for mobile
opportunistic net-works. We evaluated and compared our protocol's
performance to five existing routing protocols, by simulations driven
by real mobility traces. We found that the basic routing protocols
are not practical for large-scale opportunistic
networks. Prediction-based routing protocols trade off message
delivery ratio against resource usage and performed well and
comparable to each other.
Yong Sheng, postdoc in CMC projects, departs for Google
All our best wishes to Dr. Yong Sheng, who received his Ph.D under
George Cybenko at the Thayer School of Engineering and then joined the
CMC's MAP project for a year-long postdoctoral fellowship. Yong starts
next month in the China division of Google, based in Seattle. We will
all miss his cheerful disposition and his many contributions to
research in the CMC lab. Good luck, Yong!
Vijay received his B. Tech. in Computer Engineering from Dr Babasaheb
Ambedkar Technological University, Lonere, India in 2000. He received
his Ph. D. in Computer Science from Western Michigan University in
2007. He designed lightweight intrusion detection techniques for
wireless sensor networks as part of his Ph. D. dissertation. He joined
ISTS as a post-doctoral fellow in February 2007 and is working with
Prof. David Kotz and Prof. Andrew Campbell.
He has 12 publications and 3 posters in the areas of intrusion
detection for wireless sensor networks, localization, security and
privacy. He was an honorable mention at a student research poster
competition held at 7th Annual Information Security Symposium (by
CERIAS at Purdue University). He was an honorable mention for an
excellence in research award at the Department of Computer Science,
Western Michigan University for two years 2004-2005 and 2005-2006.
He did internships at ABN Amro (Mumbai), Crompton Greaves (Mumbai) and Manatron
(Portage, MI).
He is a member of UPE and served as a vice president of the local chapter at
Western Michigan University in 2003-2004.
CMC TEAM DEMONSTRATES "MAP" SYSTEM TO AIR FORCE, NAVY,
and US Secret Service
At the invitation of the Air Force Information Operations Center, and
coordinated by HSARPA in the Department of Homeland Security, the MAP team
took their demo on their road. The MAP project - "Measure, Analyze,
Protect" aims to detect and respond to attacks on a production Wi-Fi
wireless network on an enterprise scale. Since the MAP system is currently
deployed throughout Sudikoff Lab for Computer Science, involving 20 wireless
access points and two rack-mounted servers, it was no easy feat to make the
demo portable! In the end, six laptops, four access points, and countless
cables and accessories were shipped to San Antonio and set up at the host
site - the Southwest Research Institute. Key researchers from the Air Force
Information Operations Center, and guests from the Naval Research Lab (in
Washington DC) attended. This demo was possible because of the tireless
efforts of Yong Sheng, Keren Tan, Bennet Vance, and Udayan Deshpande.
In February the MAP team demonstrated MAP to the US Secret
Service in Miami, Florida.
Network World just ran the story about a CMC project
Researchers
crafting intelligent, scalable WLAN defense. More about our
project MAP: Measure,
Analyze, Protect, security through measurement for wireless LANs.
postdoc Minkyong Kim departs for IBM TJ Watson Research Center
Dr. Yong Sheng, who just completed his Ph.D under George Cybenko in the PQS
project, begins today as a postdoc in the MAP group. MAP is the "Measure,
Analyze, Protect" project, funded by HSARPA, to build a scalable real-time
intrusion-detection system for Wi-Fi networks. Yong brings deep
mathematical skills and extensive intrusion-detection skills and will be
working with the analysis team to develop new and more robust attack
detectors.
Yong's thesis, entitled "The Theory of Trackability and Robustness for
Process Detection," is available online at
http://www.dartmouth.edu/~ysheng/thesis/ysthesis.web.pdf
postdoc Tristan Henderson departs for University of
St Andrews in Scotland
Post-Doctoral Opening
CALL FOR PARTICIPATION
CRAWDAD Workshop 2006
Community Resource for Archiving Wireless Data At Dartmouth
In Cooperation with ACM SIGMOBILE
http://crawdad.cs.dartmouth.edu/workshop2006
September 25th, 1:30pm-6:00pm
Co-located with MobiCom in Los Angeles, CA, USA
Palm Computing, the leading vendor of personal digital assistants and
smart phones, has donated a collection of Treo 650 smart phones and
Tungsten E2 PDAs for use in our research and education projects. So far
these have been used by software-design students to develop a mobile
user-survey application for a local science museum, by a research student
to explore secure interactions between PDAs and public kiosk computers,
and by the PLACE project. We are grateful to Palm Computing for their
generous donation.
Aruba Networks, a leading vendor of Wi-Fi networking equipment to
enterprises around the world, donated several of their AP70-model access
points to our wireless networking lab. These APs have immediately been
useful for experimental work in security (MAP project) and for sensor-net-
work experiments (PLACE project). These versatile APs have two radios
and a USB port. We are grateful to Aruba Networks for their generous
donation.
Jihwang Yeo is a programmer and administrator for the CRAWDAD
project, working with Professors David Kotz and Tristan Henderson.
His current work is focused on providing the research community with
a large wireless network resource archive, e.g., data sets and tools.
He was a research assistant in the MIND (Maryland Information and
Network Dynamics) lab at University of Maryland, where his primary
contribution was the development of a wireless monitoring technique
for the analysis and modeling of wireless traffic. His professional
career also includes developing an XML/SOAP-database gateway when he
worked at the IBM Almaden Research Center in summer 2001. He received
a master's degree in Computer Science from University of Maryland,
College Park MD. He also holds a bachelor's degree and another
master's degree in Computer Engineering from Seoul National
University in Korea.
Apu Kapadia received his PhD from the University of Illinois at
Urbana-Champaign and was the recipient of a four-year
High-Performance Computer Science Fellowship from the Department of
Energy. His doctoral research focused on trustworthy communication
and models for privacy in pervasive environments. In October 2005,
Apu joined ISTS as a Post-Doctoral Research Fellow and is working
with Profs. David Kotz and Sean Smith on topics related to location
privacy, mobile computing, trust-worthy platforms, and public-key
infrastructures.
postdoc Arnab Paul departs for Intel Corporation
CRAWDAD Workshop 2005 held at Mobicom
September 1, 2005
New PhD Openings
Auguest 11,2005
Bennet Vance was a public school student in Hanover when computing
arrived at Dartmouth in the 1960s. Bennet soon acquired the habit of
heading over to the computation center after school to try out his
latest BASIC programs. His subsequent career as a software developer
has included stints at AT&T Bell Laboratories in New Jersey; at True
BASIC, the compiler company co-founded by Dartmouth computing
pioneers John Kemeny and Thomas Kurtz; and at the IBM Almaden
Research Center in Silicon Valley, where he helped extend IBM's DB2
database system. Returning to Hanover in 2001, Bennet worked in
Dartmouth's Department of Psychological and Brain Sciences before
taking his current position with the CMC. He holds a bachelor's
degree in math from Yale and graduate degrees in computer science
from Stanford and from the OGI School of Science & Engineering.
July 2, 2005
The CMC just launched a major new effort at Dartmouth College, a Community Resource for Archiving Wireless
Data at Dartmouth (CRAWDAD).
NSF has funded this effort to build a community resource, an archive with the capacity to store wireless
trace data from many contributing locations, with the staff to develop better tools for collecting,
anonymizing, and analyzing the data. This Community Resource for Archiving Wireless Data At Dartmouth,
CRAWDAD, will work with community leaders to ensure that the archive meets the needs of the research
community, work with the other leading centers that develop network tracing tools and metadata, and work
with research organizations and corporations to ensure continuing support for the archive after NSF's
funding ends.
July 2, 2005
After several years on the faculty at Columbia University, Andrew Campbell is moving to Dartmouth College as
an Associate Professor of Computer Science. Andrew brings to the CMC his long track record in mobile
computing and wireless networking, and looks forward to working with CMC faculty and students on a variety of
new projects.
Andrew is investigating the synthesis between the demands of highly dynamic systems (e.g., mobile and
wireless systems), the need to embed better service creation engines into the network infrastructure, and the
development of quantitative and scalable resource provisioning models for such environments. His work tends
to connect the theoretical with the practical, architecting new networking systems that contribute to the
development of the wireless Internet. In his research on QoS (quality of service), he developed a new
approach to delivering service differentiation based in wireless networks based on economic theory supporting
the notion of incentive engineering in wireless packet networks. And, in the area of programmable networks,
Andrew has designed, developed and implemented one of the first programmable mobile networking platforms
(Mobiware) with an emphasis on service creation in wireless networks.
One of Andrew's current projects is Armstrong, which is focused on resilient transport and control mechanisms
for sensor networks. This project is developing new technologies for wireless sensor and ad hoc networks.
This project is developing a new congestion control framework for wireless sensor networks, a new reliable
transport protocol for wireless sensor networks, and a new routing scheme for wireless ad hoc networks that
is based on dynamic variable transmission range power control.
Andrew is perhaps best known for his work on Cellular IP, which provided an alternative approach to that
found in mobile telecommunications (e.g., General Packet Radio Service) and in IP networking (Mobile IP).
Cellular IP represents a new mobile host protocol that is optimized to provide access to a Mobile IP enabled
Internet in support of fast-moving wireless hosts. Cellular IP incorporates a number of important cellular
principles but remains firmly based on IP design principles allowing Cellular IP to scale from pico- to
metropolitan-area installations.
Andrew received a prestigious NSF CAREER award in 1999, and his other research grants come from a wide
variety of federal and corporate sources.
Andrew has extensively served our scientific community through conference program committees and journal
editorial boards. Most recently he was program co-chair for ACM MobiHoc 2005.
The CMC is pleased to have Andrew on the team.
July 2, 2005
With the rise of Voice over wireless LAN (VoWLAN), any complete WiFi security solution must address
denial of service attacks, such as kicking off other clients, consuming excessive bandwidth, or spoofing
access points, to the detriment of legitimate clients. Even authorized clients may be able to sufficiently
disrupt service quality to make the network ineffective for legitimate clients. Our approach provides a new
foundation for wireless network security, able to dynamically measure, analyze and protect a WiFi network
against existing and novel threats, including rogue clients and access points, with a focus on VoWLAN use
cases. Our goal is to support thousands of APs and clients, quickly recognize most new attacks, and generate
few false alarms.
funded by HSARPA
Post-Doctoral RESEARCH FELLOW POSITION in SOCIOLOGY AVAILABLE
(PDF
format)
ISTS/CMC postdoctoral fellowships available
Arnab Paul
Arnab Paul is a post-doctoral research associate, working with Prof. David Kotz.
His broad research interests lie in
mobile and distributed systems. He is investigating various issues arising at the intersection
of robustness and security in such systems. He recently finished his PhD from the College of
Computing, Georgia Tech, where he worked on various including distributed storage, authentication
protocols for wireless systems, cluster computing and distributed programming.
His current work is focused on secure and fault tolerant sensor networks.
Minkyong Kim
Minkyong Kim is currently working as a post-doc with Professor David Kotz. Her research interests include wireless networks, mobile computing, and distributed systems. For her Ph.D. degree, she worked on designing a file system for mobile clients and estimating network capacity for adaptive systems. She received her Ph.D. in Computer Science & Engineering from the University of Michigan. She got her B.S. and M.S. in Computer Engineering from Seoul National University.
Brad Noblet, Director of Computing Techinical ServiceS, is the seventh and newest member to join the CMC team.
Brad, a veteran computer industry manager, will be Dartmouth's new director of computing technical services, with responsibility for Dartmouth's data,telephone and cable TV networks, central machine room operations and software development.
A 1982 graduate of Indiana University at Bloomington in computer science, Brad was that school's manager of data communications, with responsibility for the institution's statewide data network. He then left for private industry, working in product development for a number of hardware manufacturers. At Ungerman-Bass,Brad served as director of engineering and general manager overseeing development of the world's first smart hub -- a device that allows computers to share a single network connection.
Sean Smith, Assistant Professor of Computer Science, is now one of six
faculty associated with the CMC. His work increasingly addresses the
authorization and authentication issues involved with wireless
networks and mobile computing.
Ayorkor Mills-Tettey and Prof. David Kotz
won the best student paper award at the 21st IEEE International Performance,
Computing, and Communications Conference for their paper entitled "Mobile Voice
Over IP (MVOIP): An Application-level Protocol for Call Hand-off in Real Time
Applications". 
Kobby helped to
deploy all of the hardware and software necessary to trace the activity of the
wireless network over the fall term, and then to write the software necessary
to crunch the data. He went on to complete a senior thesis in computational
biology, and Fall 2002 he begins a Ph.D program in bioengineering at the
University of Pennsylvania. 
Chris was awarded High Honors
for his work in the Solar project, in which he developed a small language and
run-time system that can define "roles" in terms of the changing context. A
role is a set of users who should be granted certain access rights associated
with that role. For example, one might define a role called "room213" whose
membership should be defined to be any user currently located in room 213.
Then services, such as the projector, the room lights, and the sound system,
might grant access only to users in role "room213". 
Kazuhiro Minami presented his
thesis proposal this spring. His research will focus on the security and
privacy issues related to our Solar system for context-aware mobile computing.
He will solve two problems: first, controlling access to context information
produced by sensors and other information sources, which is critical to
protect the privacy of people who are being monitored. Second, using context
information to make decisions about access to other services in the
environment. 
Abe was awarded High Honors
for his work in the Solar project, in which he studied the fundamental
performance of Solar's event-distribution mechanism, and added an extensible
framework to allow events to be distributed in a variety of formats,
particularly XML. Abe has founded his own company to develop and market his
Java persistence software tools.