Communications Systems Center

Publications

Tue, 18 Sep 2007 01:27:22 GMT

Download Citations

2007

Yusun Chang, Christopher P. Lee, John Copeland, "Goodput Optimization in CSMA/CA Wireless Networks.", IEEE BROADNETS. Durham, NC. Sep 07.
Yusun Chang, Chris Lee, B. Kwon, John Copeland, “Dynamic Optimal Fragmentation with Rate Adaptation for Goodput Enhancement in WLANs,” Proceedings of the ICWN(International Conference on Wireless Networks) ’07, Las Vegas, Jun. 2007, pp. 12-pp.17.
Kevin D. Fairbanks, Christopher P. Lee, Ying H. Xia, Henry L. Owen III. “TimeKeeper: A Metadata Archiving Method for Honeypot Forensics.” 8th Annual IEEE SMC Information Assurance Workshop. West Point, NY. 20-22 June 2007
Yusun Chang, Chris Lee, B. Kwon, John Copeland, "Dynamic Optimal Fragmentation with Rate Adaption for Goodput Enhancement in Wireless LANs ", Proceedings of the IEEE TridentCom 2007, Orlando, May 2007.
Christopher P. Lee, Keshav Attrey, Carlos Caballero, Nick Feamster, Milena Mihail, John A. Copeland, "MobCast: Overlay Architecture for Seamless IP Mobility using Scalable Anycast Proxies," IEEE Wireless Communications and Networking Conference, Hong Kong, March 11-15, 2007.

2006

Yusun Chang, Chris Lee, John Copeland, "Optimal Fragmentation for Goodput Enhancement in IEEE 802.11 WLANs," Proceedings of the IASTED CIIT '06, Nov. 2006, pp. 265-pp.270.
Lee, C. P. and Copeland, J. A. 2006. "Flowtag: a collaborative attack-analysis, reporting, and sharing tool for security researchers." In Proceedings of the 3rd international Workshop on Visualization For Computer Security (Alexandria, Virginia, USA, November 03 - 03, 2006). VizSEC '06.
K. Abdullah, C. Lee, G. Conti and J. Copeland. "Processing Data to Construct Practical Visualizations for Network Security," Information Assurance Newsletter, Information Assurance Technology Analysis Center, United States Department of Defense, Summer 2006.
G. Conti, K. Abdullah, J. Gizzard, J. Stasko, J. Copeland, M. Ahamad, H. Owen and C. Lee, "Countering Security Analyst and Network Administrator Overload Through Alert and Packet Visualization," IEEE Computer Graphics and Applications (CG&A), March 2006.

2005

Kulsoom Abdullah, Chris Lee, John A. Copeland, "Visualizing Network Data for Intrusion Detection", 6th IEEE Information Assurance Workshop, June 2005
Chris Lee, Jason Trost, Nick Gibbs, Raheem Beyah, John A. Copeland, "VisualFirewall: A Firewall Visualization Tool for Network Management and Security Analysis", VizSEC 2005, October 2005.
Kulsoom Abdullah, Chris Lee, Greg Conti, John A. Copeland, John Stasko, "IDS RainStorm: Visualizing IDS Alarms", VizSEC 2005, October 2005.
J. Tang and J. A. Copeland, "Mobile IPv4 secure firewall traversal with deployment of foreign agents," 2005.
Brawerman A., Copeland J. A., "An Anti-Cloning Framework for Software Defined Radio Mobile Devices," appeared in the Proceedings of the IEEE International Conference on Communications. May 2005.
Brawerman A, Bing B., Blough D., "A Light Differential Download Algorithm for Software Defined Radio Devices," appeared in the Proceedings of the IEEE Consumer Communication & Networking Conference. January 2005.

2004

S.-E. Kim, J. A. Copeland, C. Canfeng, W. Lei, L. Liang, and W. Weiling, "Interworking between WLANs and 3G networks: TCP challenges," 2004.
S.-E. Kim and J. A. Copeland, "Interworking between WLANs and 3G networks: TCP challenges," 2004.
S.-E. Kim and J. A. Copeland, "Enhancing TCP performance for intersystem handoff within heterogeneous mobile networks," 2004.
Brawerman A., Bing B., Blough D., "Securing the Download of Radio Configuration Files for Software Defined Radio Devices," appeared in the Proceedings of the ACM International Workshop on Mobility Management and Wireless Access. October 2004.

2003

S. E. Kim and J. A. Copeland, "TCP for seamless vertical handoff in hybrid mobile data networks," 2003.
S.-E. Kim, H. Kim, and J. A. Copeland, "Adaptive rate control scheme for handoff and its performance evaluation in mobile multimedia networks," 2003.
M. Kim and J. A. Copeland, "Bandwidth sensitive caching for video streaming application," 2003.
H. Hong and J. A. Copeland, "Optical networks with hybrid routing," Selected Areas in Communications, IEEE Journal on, vol. 21, pp. 1063, 2003.

2002

J. Sung-Eok, R. T. Alber, J. A. Copeland, and Y. Pan, "Path selection with class distribution information in the integrated network," Communications Letters, IEEE, vol. 6, pp. 88, 2002.
S.-E. Kim, K. Heechang, and J. A. Copeland, "Dynamic radio resource allocation considering QoS in UMTS network," 2002.
Y.-K. Ke and J. A. Copeland, "Maximal reservable bandwidth tree - a new approach to reduce the storage of state information," 2002.
A. F. Kamal, C. P. Wong, and J. A. Copeland, "An original modeling process and technology with intra-package crosstalk consideration for compact array antennas on the 4G communications packages," 2002.
A. F. Kamal, N. B. Taher, M. Swaminathan, and J. A. Copeland, "Test results for the development of a novel region-based DOCSIS compliant cable plant system and protocol to optimally reduce contention mini-slot collisions and to support QoS on DOCSIS 1.1/1.2 networks," 2002.
H. Hong and J. A. Copeland, "A series of Hamiltonian cycle-based solutions to provide simple and scalable mesh optical network resilience," Communications Magazine, IEEE, vol. 40, pp. 46, 2002.
H. Hong and J. A. Copeland, "Multi-domain mesh optical network protection using Hamiltonian cycles," 2002.
R. A. Beyah, C. S. Turner, C. L. Corbett, and J. A. Copeland, "A mobility enhancement for switched wireless Ethernet with soft handoff," 2002.
R. A. Beyah, M. C. Holloway, and J. A. Copeland, "Invisible Trojan: an architecture, implementation and detection method," 2002.

2001

J. Sung-Eok and J. A. Copeland, "Path selection with class distribution information in the integrated network," 2001.
Y.-K. Ke and J. A. Copeland, "Aggregation algorithms for asymmetric QoS-routing information," 2001.
H. Hong and J. A. Copeland, "Hybrid wavelength and sub-wavelength routed optical networks," 2001.
C.-J. Ho, J. A. Copeland, L. Chin-Tau, and G. L. Stuber, "On call admission control in DS/CDMA cellular networks," Vehicular Technology, IEEE Transactions on, vol. 50, pp. 1328, 2001.
J. A. Copeland and R. C. Garcia, "Real-time anomaly detection using soft-computing techniques," 2001.

2000

H. Zheng, S. Wang, and J. A. Copeland, "QoS constrained resource allocation for multimedia wireless networks," 2000.
H. Zheng, S. Wang, and J. A. Copeland, "Multi-level resource allocation for video delivery over CDMA/TDD systems," 2000.
S. Wang, H. Zheng, and J. A. Copeland, "A QoS enhanced hybrid SR-ARQ for mobile video communications," 2000.
S. Wang, H. Zheng, and J. A. Copeland, "An error control design for multimedia wireless networks," 2000.
Y.-K. Ke and J. A. Copeland, "Scalability of routing advertisement for QoS routing in an IP network with guaranteed QoS," 2000.
C.-J. Ho, J. A. Copeland, L. Chin-Tau, and G. L. Stuber, "Impact of the cell size on the cell's Erlang capacity and call admission control in the DS/CDMA cellular networks," 2000.
R. C. Garcia and J. A. Copeland, "Soft computing tools to detect and characterize anomalous network behavior," 2000.
M. Arpaci, H. Uzunalioglu, and J. A. Copeland, "TCP performance over heterogeneous networks," 2000.
M. Arpaci and J. A. Copeland, "An adaptive queue management method for congestion avoidance in TCP/IP networks," 2000.

1999

H. Zheng, S. Wang, and J. A. Copeland, "QoS aware mobile video communications," 1999.
T. Ozugur, M. Naghshineh, P. Kermani, and J. A. Copeland, "Fair media access for wireless LANs," 1999.
T. Ozugur, J. A. Copeland, M. Naghshineh, and P. Kermani, "Next-generation indoor infrared LANs: issues and approaches," Personal Communications, IEEE [see also IEEE Wireless Communications], vol. 6, pp. 6, 1999.
S.-H. Jeong, K. H. Deh-Phone, W. Tsong-Ho, and J. A. Copeland, "Trunking performance analysis of AAL2 for VBR voice transport," 1999.

1998

T. Ozugur, M. Naghshineh, P. Kermani, C. M. Olsen, B. Rezvani, and J. A. Copeland, "ARQ protocol for infrared wireless LANs: packet-level ACK or no-packet-level ACK?" 1998.
T. Ozugur, M. Naghshineh, P. Kermani, C. M. Olsen, B. Rezvani, and J. A. Copeland, "Performance evaluation of L-PPM links using repetition rate coding," 1998.
T. Ozugur, N. Mahmoud, K. Parviz, C. M. Olsen, R. Babak, and J. A. Copeland, Balanced media access methods for wireless networks. Dallas, Texas, United States: ACM Press, 1998.
S.-H. Jeong and J. A. Copeland, "Cell loss ratio and multiplexing gain of an ATM multiplexer for VBR voice sources," 1998.

Yusun Chang

Tue, 18 Sep 2007 01:27:05 GMT

Contact Information

Email: yusun@ece.gatech.edu
My personal website: http://www.prism.gatech.edu/~gtg312k/
Phone: (404) 894-0179
Fax: (404) 894-0035

Research Goals

Modeling and optimizing performance of wireless networks.
Solving problems in wireless networks to achieve better performance.

Current Research

WLAN/WMAN performance optimazition
Optimum Rate control and channel estimation in Wireless Networks
Optimal Fragmentation and modeling in WLAN
Fast Handoff in Wireless Mobile Networks

Education

2002 - MS in Electrical Engineering at Columbia University

Publications

Yusun Chang, Christopher P. Lee, John Copeland, "Goodput Optimization in CSMA/CA Wireless Networks.", IEEE BROADNETS. Durham, NC. Sep 07.
Yusun Chang, Chris Lee, B. Kwon, John Copeland, “Dynamic Optimal Fragmentation with Rate Adaptation for Goodput Enhancement in WLANs,” Proceedings of the ICWN(International Conference on Wireless Networks) ’07, Las Vegas, Jun. 2007, pp. 12-pp.17.
Yusun Chang, Chris Lee, B. Kwon, John Copeland, "Dynamic Optimal Fragmentation for Goodput Enhancement in Wireless LANs", Proceedings of the IEEE TridentCom '07, Orlando, May 2007.
Yusun Chang, Chris Lee, John Copeland, "Optimal Fragmentation for Goodput Enhancement in IEEE 802.11 WLANs," Proceedings of the IASTED CIIT '06, Nov. 2006, pp. 265-pp.270.
E. Shim, H. Wei, Yusun Chang, R. Gitlin, "Low Latency Handoff for Wireless IP QOS with NeighborCasting," Proceedings of the IEEE ICC '02, Apr. 2002, pp. 3245-pp.3249.
Mistral Weapon System, training and doctrine manuals, Artillery School, Korea Air Force (Apr. 1998)
J Back, Yusun Chang, "Parallel Extended Local Feature Extraction On Distributed Memory Computer," Proceedings of the International Conference on MFI '94, Oct. 1994, pp. 128-pp.135.
Y. Chang, K. Lee, "A Study on the Fuzzy Inference Adaptive Control of Robot Manipulators," Proceedings of the Conference on Control, Automation and Systems Engineering, Apr. 1995, pp. 226-pp.229.

Chris Lee

Tue, 18 Sep 2007 01:26:44 GMT

Contact Information

Email: chrislee@gatech.edu
My personal website: http://chrislee.dhs.org/
Phone: (404) 894-2085
Fax: (404) 894-0035

Research Goals

My primary goal is to enable usable security by using visualization techniques that make security concepts clear to the average user of the technology. Furthermore, I want to enable the general computer user to manage their personal security (privacy, authentication, availability, pertainence, and non-repudation) through the use of visualization techniques that clearly illustrate and educate security concepts in a format that is native and natural to the user.

Current Research

IDS Alarm Visualization
Firewall Visualization
PGP Key Visualization
PGP Web-of-trust Visualization
Visualization Enabled Human to Computer Authentication
Mobile Ad Hoc Wireless Network Power Management

Education

2005 - MS in Electrical and Computer Engineering at Georgia Tech
2001 - BS in Computer Engineering at Georgia Tech

Publications

Yusun Chang, Christopher P. Lee, John Copeland, "Goodput Optimization in CSMA/CA Wireless Networks.", IEEE BROADNETS. Durham, NC. Sep 07.
Yusun Chang, Chris Lee, B. Kwon, John Copeland, “Dynamic Optimal Fragmentation with Rate Adaptation for Goodput Enhancement in WLANs,” Proceedings of the ICWN(International Conference on Wireless Networks) ’07, Las Vegas, Jun. 2007, pp. 12-pp.17.
Kevin D. Fairbanks, Christopher P. Lee, Ying H. Xia, Henry L. Owen III. “TimeKeeper: A Metadata Archiving Method for Honeypot Forensics.” 8th Annual IEEE SMC Information Assurance Workshop. West Point, NY. 20-22 June 2007
Yusun Chang, Chris Lee, B. Kwon, John Copeland, "Dynamic Optimal Fragmentation with Rate Adaption for Goodput Enhancement in Wireless LANs ", Proceedings of the IEEE TridentCom 2007, Orlando, May 2007.
Christopher P. Lee, Keshav Attrey, Carlos Caballero, Nick Feamster, Milena Mihail, John A. Copeland, "MobCast: Overlay Architecture for Seamless IP Mobility using Scalable Anycast Proxies," IEEE Wireless Communications and Networking Conference, Hong Kong, March 11-15, 2007.
Yusun Chang, Chris Lee, John Copeland, "Optimal Fragmentation for Goodput Enhancement in IEEE 802.11 WLANs," Proceedings of the IASTED CIIT '06, Nov. 2006, pp. 265-pp.270.
Lee, C. P. and Copeland, J. A. 2006. "Flowtag: a collaborative attack-analysis, reporting, and sharing tool for security researchers." In Proceedings of the 3rd international Workshop on Visualization For Computer Security (Alexandria, Virginia, USA, November 03 - 03, 2006). VizSEC '06.
K. Abdullah, C. Lee, G. Conti and J. Copeland. "Processing Data to Construct Practical Visualizations for Network Security," Information Assurance Newsletter, Information Assurance Technology Analysis Center, United States Department of Defense, Summer 2006.
G. Conti, K. Abdullah, J. Gizzard, J. Stasko, J. Copeland, M. Ahamad, H. Owen and C. Lee, "Countering Security Analyst and Network Administrator Overload Through Alert and Packet Visualization," IEEE Computer Graphics and Applications (CG&A), March 2006.
Chris Lee, Jason Trost, Nick Gibbs, Raheem Beyah, John A. Copeland, "VisualFirewall: A Firewall Visualization Tool for Network Management and Security Analysis", VizSEC 2005, October 2005.
Kulsoom Abdullah, Chris Lee, Greg Conti, John A. Copeland, John Stasko, "IDS RainStorm: Visualizing IDS Alarms", VizSEC 2005, October 2005.
Kulsoom Abdullah, Chris Lee, John A. Copeland, "Visualizing Network Data for Intrusion Detection", 6th IEEE Information Assurance Workshop, June 2005

Bongkyoung Kwon

Thu, 28 Jun 2007 23:05:00 GMT

Contact Information

Email: bkkwon21@gatech.edu
My personal website:
Phone: (404) 894-2085
Fax: (404) 894-0035

Research Goals

My primary goal is to enable mobile security by unifying diverse security standards. This will enable rapid deployment of competing wireless standards while maintaining a highly secure environment for the end-user. My research is in understanding the needs of wireless providers and users and finding the optimal tradeoff of personal and infrastructure security.

Current Research

Simulation and implementation of DOFRA
MAC Protocols

Education

2005 - Began PhD program at Georgia Tech
1997 - MS in Electrics and Communications at Kwangwoon University
1995 - BS in Electrics and Communications at Kwangwoon University

Publications

Yusun Chang, Chris Lee, B. Kwon, John Copeland, “Dynamic Optimal Fragmentation with Rate Adaptation for Goodput Enhancement in WLANs,” Proceedings of the ICWN(International Conference on Wireless Networks) ’07, Las Vegas, Jun. 2007, pp. 12-pp.17.
B. Kwon, H. Kim, "Implementation of TMN-based Performance Proxy Agent for ATM Switching Systems" Journal of KICS, Vol. 22, No. 5A, 2002.
B. Kwon and K. Chung, " An Efficient Causal Ordering Algorithm in Overlapping Groups," Journal of KICS, Vol. 24, No. 7A, 1999. 7.
Hwa-Sung Kim, Bong-Kyung Kwon, Wang-Don Woo "Q3 Object Model based Performance Monitoring Architecture for ATM Switches", The Third Conference on Communication Software, 1998.
B. Kwon and K. Chung, "An Causal Ordering Algorithm using new compression method", Journal of KICS, Vol 22, No. 6, 1997. 6.
B. Kwon, K. Chung, D. Hyun, J. Ham, "A multicast algorithm in overlapped process group", Journal of KICS, Vol 21, No. 5, 1996. 5

Work Experience

LG Electronics, Senior Engineer (2003 ~ 2005)
- Developed the CORBA Agent based on3GPP specification for WCDM equipments
- Implemented Element Management System(EMS) for WCDMA equipments
- Developed alarm Interface functions for WCDMA equipments
Mercury Corporation, Senior Engineer (2000 ~ 2003)
- Developed Common Management Information Protocol(CMIP) agent for the MSC server.
- Implemented Gateway function between the CMIP agent and the MSC server.
- Developed Korea Telecom Common Interface Function for the MSC server
- Developed GUI for operating MSC server.
Daewoo Telecommunication, Senior Engineer (1997 ~ 2000)
- Developed GUI for Multi-Service Switch
- Implemented embedded maintenance function for ATM switch
- Co-developed the CMIP agent for ATM switch with SAMSUNG, LG and ETRI

Dr. John Copeland

Thu, 28 Jun 2007 23:05:00 GMT

Contact Information

Phone: (404) 894-5177
Fax: (404) 894-0035
Email: john.copeland@ece.gatech.edu
Web page: http://www.csc.gatech.edu/copeland/

Educational Background

Ph.D. Physics, Georgia Institute of Technology, 1965
M.S. Physics, Georgia Institute of Technology, 1963
B.S. Physics, Georgia Institute of Technology, 1962

Personal Biography

Prof. John A. Copeland holds the John H. Weitnauer, Jr., Chair in the School of Electrical and Computer Engineering at the Georgia Institute of Technology, and is a Georgia Research Alliance Eminent Scholar. He is the Director of the Communications Systems Center (CSC). This center is doing research on high-speed optical fiber networks that use Asynchronus Transfer Mode (ATM) switches to carry Internet Protocol data, high-quality video conferencing, and other high-bandwidth applications. Dr. Copeland chairs a sub-committee of the Governor's Information Technology Policy Council that does strategic planning for the development of Georgia's next digital communications network. He also serves on the National Research Council committee that is preparing a report on the Future of Research in the Information Technology Industry.

He served as Director of the Georgia Center for Advanced Telecommunications Technology (GCATT) from June 1993 to Nov. 1996. As Director, Dr. Copeland had broad responsibilities for the organizational, programmatic, and financial development of GCATT. In that period, GCATT managed a Georgia Research Alliance program that distributed approximately $20,000,000 to six Georgia research universities. It was allocated $24,000,000 by the State of Georgia and $5,000,000 by private and industry sources for a 150,000 sq. ft. building which was completed in June 1996.

Prior to joining Georgia Tech in March 1993, Dr. Copeland was Vice President, Technology at Hayes Microcomputer Products (1985-1993), and Vice President, Engineering Technology at Sangamo Weston, Inc. (1982-1985) and served at Bell Labs (1965-1982).

He began his career at Bell Labs conducting research on semi-conductor microwave and millimeter-wave devices. Later, he supervised a group that developed magnetic bubble computer memories. In 1974, he led a team that designed CMOS integrated circuits, including Bell Labs' first microprocessor, the BELLMAC-8. His last contributions at Bell Labs were in the area of lightwave communications and optical logic. At Sangamo Weston he was responsible for R&D groups at ten divisions. At Hayes was responsible for the development of modems with data compression and error control, and for Hayes' representation on CCITT and ANSI standards committees. In 2000 he invented the StealthWatch system for network security monitoring, and founded LANcope, Inc. which today has deployed StealthWatch on over 100 corporate, government, and defense networks.

Dr. Copeland received B.S., M.S. and Ph.D. degrees in physics from the Georgia Institute of Technology. He has been awarded 41 patents and has published over 50 technical articles. In 1970 he was awarded IEEE's Morris N. Liebmann Award for his work on gallium arsenide microwave devices. He is a Fellow of the IEEE and has served that organization as the Editor of the IEEE Transactions on Electron Devices. He served on the Board of Trustees for the Georgia Tech Research Corporation (1983-1993).

Honors and Awards

Ferst Award for Graduate Student Research at Georgia Tech, 1965.
IEEE Solid State Circuits Conference Best Paper Award, 1967.
IEEE Morris Liebmann Award for LSA MM-Wave Oscillator, 1972.
IEEE Fellow for optically-coupled semiconductor logic circuits, 1987.
John H. Weitnauer Chair at Georgia Tech, 1993.

TimeKeeper

Mon, 11 Jun 2007 21:02:00 GMT

From: TimeKeeper: A Metadata Archiving Method for Honeypot Forensics by Kevin D. Fairbanks, Christopher P. Lee, Ying H. Xia, Henry L. Owen III

Internet attacks are becoming more advanced as the economy for cybercrime grows and the tools for evading detection become ubiquitous. To counter this threat, new detection and forensics tools are needed to capture these new techniques. In this paper, we propose a method to extract and analyze a richer set of forensic information from the file system journal of honeypots in spite of anti-forensic tool use. We show initial results of our journal monitoring prototype, TimeKeeper, of file system activities and argue that by detecting these events, we are able to capture previously unavailable forensic information. This forensic information can then be used for system recovery, research on attack techniques, insight into attacker motives, and for criminal investigations.

Communication Systems Center

Mon, 11 Jun 2007 21:01:00 GMT

The Communications Systems Center (CSC), part of the School of Electrical and Computer Engineering at Georgia Tech, and are closely affilieated with GCATT.
We have active research programs in the areas of

Our offices and lab are located on the 3rd floor of the Klaus Advanced Computing building. In our lab, we have:

C and K-band Satellite Receivers and Antennas (donated by Scientific Atlanta Inc.),
an 802.11 Wireless Testbed,
a Video Conferencing Testbed, and
a Fiber Optic Testbed supporting both SONET and ATM.

The Communications Systems Center strives to perform leading research on communications systems; produce graduates that have made significant advances in communications systems technology; and to help business, health, education, and government organizations benefit from our research and experience. We have received funding for several important projects and continues to attract significant funding in both fundamental telecommunications research and telecommunications design.

Dynamic Optimal Fragmentation with Rate Adaptation

Mon, 11 Jun 2007 20:53:00 GMT

From: Dynamic Optimal Fragmentation with Rate Adaption (DOFRA) for Goodput Enhancement in Wireless LANs by Yusun Chang, Chris Lee, and John A. Copeland

The demand for broadband wireless communication has been increasing, and wireless local area networks (WLAN) have provided high data rate, far exceeding that offered by the third generation (3G) networks. To accommodate these requests, wireless systems should work well in typical wireless environments, characterized by path loss of the signals, multi path fading, interference to adjacent channels, and random errors. The IEEE 802.11 WLANs use the unlicensed industrial, scientific and medical (ISM) band, which is vulnerable to noise generated by TVs, microwaves, and cordless phones. In this paper, we propose a simple way to enhance system goodput through the optimal fragmentation. The number of contending stations, packet collisions, packet error probabilities, and fragmentation overheads are modeled in the analysis. Through the rigorous analysis and extensive experiments, we show that the dynamic optimal fragmentation with rate adaptation [DOFRA] enhances the goodput approximately 18.4% in a moderate bit error rate. The proposed optimal fragmentation is a comprehensive and realistic approach as compared with existing work.

What's New

Mon, 11 Jun 2007 20:13:00 GMT

May 2007

Yusun Chang's Dynamic Optimal Fragmentation with Rate Adaption for Goodput Enhancement in Wireless LANs paper submission to IEEE TridentCom 2007 was accepted.

April 25, 2007

Selcuk Uluagac received an Outstanding ECE GTA Award at the End of the Year Awards Program.

December 12, 2006

Our lab moved! We are now located in the Klaus Advanced Computing building. Please come by and visit. :)

December 7, 2006

Chris Lee's MobCast: Overlay Architecture for Seamless IP Mobility using Scalable Anycast Proxies paper submission to WCNC 2007 was accepted.

October, 2006

Dr. Raheem Beyah Bio was published as part of an article, "2006, the Best and Brightest, Forty under Forty", in the October edition of Georgia Trend magazine (p.30), by Shannon Wilder.

August 16th, 2006

Chris Lee's FlowTag: A collaborative attack-analysis, reporting, and sharing tool for security researchers paper submission to VizSec 2006 was accepted.

June 26th, 2006

Dr. Jin Tang did an excellent defense of her thesis, Mobile IPv4 Secure Access to Home Networks, today. This work is closely related to her Secure Mobile IP Firewall Traversal work, published in Mobile IPv4 Secure Firewall Traversal with Deployment of Foreign Agents. We wish her well in her career and future.

May 13th, 2006

Dr. Copeland hosted a party at his house for his graduate students in celebration of the wonderful successes of this newly-ended semester.

May 5th, 2006

We've had a busy month. 4 people passed their PhD defense and one successfully passed his thesis proposal.

Dr. Jian Liu — Fractral Network Traffic Analysis with Applications
Dr. Cherita Corbett — Securing Access to Wireless Local Area Networks Using a Passive Approach to Device Identification
Dr. Sung-Eun Kim — Efficient and QoS Guaranteed Data Transport in Heterogeneous Wireless Mobile Networks
Dr. Kulsoom Abdullah — Scaling and Visualizing Network Data to Facilitate in Intrusion Detection Tasks
Yusun Chang — Dynamic Optimal Fragmentation with Rate Adaptation for Goodput Enhancement in Wireless Networks

FlowTag

Mon, 11 Jun 2007 18:49:00 GMT

From: FlowTag: A collaborative attack-analysis, reporting, and sharing tool for security researchers by Christopher P. Lee and John A. Copeland

Current tools for forensic analysis require many hours to understand novel attacks, causing reports to be terse and untimely. We apply visual filtering and tagging of flows in a novel way to address the current limitations of post-attack analysis, reporting, and sharing. We discuss the benefits of visual filtering and tagging of network flows and introduce FlowTag as our prototype tool for the Honeynet researchers. We argue that online collaborative analysis benefits security researchers by organizing attacks, collaborating on analysis, forming attack databases for trend analysis, and in promoting new security research areas. Lastly, we show three attacks on the Georgia Tech Honeynet and describe the analysis process using FlowTag.

MobCast

Mon, 11 Jun 2007 18:05:00 GMT

From: MobCast: Overlay Architecture for Seamless IP Mobility using Scalable Anycast Proxies by Christopher P. Lee, Keshav Attrey, Carlos Caballero, Nick Feamster, Milena Mihail, and John A. Copeland

We propose a routing overlay system, MobCast, for simple and efficient routing to mobile hosts. Mobcast nodes advertise the same address space at each proxy location, and each mobile host is assigned a ``universal" IP address from this address space, so packets sent to a mobile host's universal IP address automatically go to the nearest proxy on the overlay. The overlay then delivers the packet to the mobile host.
Our architecture enables seamless mobility for both micro and macro mobility. While our initial design is not as mature as Mobile-IP, it shows great promise to solve the traditional problems of ingress routing, firewalls, NATs, and rapid mobility with much lower complexity. We present our design as a scalable and deployable alternative to Mobile-IP.
In this paper, we focus on describing the MobCast system architecture. We form our arguments for scalability, handoff-speed, and simplicity, and give our initial results for scalability. We postpone a detailed discussion of MobCast's security model for later publishing.

Research

Mon, 11 Jun 2007 17:59:00 GMT

Wireless Security

Wireless User Fingerprinting
Fraud-Prevention Framework for Software Defined Radio Mobile Devices
Rogue AP Detection
Secure Mobile IP Firewall Traversal

Wireless Network Optimizations

Security Visualizations

HoneyNet Technology

The Georgia Tech Honeynet

People

Mon, 11 Jun 2007 15:28:00 GMT

Faculty

Staff

Graduate Students

Alumni

Selçuk Uluagac

Sun, 22 Apr 2007 05:06:00 GMT

Contact Information:
Email:selcuk@ece.gatech.edu
Phone:(404) 894-2085
Fax:(404) 894-0035

Research Goals
-Designing/analyzing network protocols
-Designing Secure Wireless Sensor Network Protocols

Current Research
Security for Wireless Sensor Networks

Education
2002 - M.Sc.in Electrical and Computer Engineering at Carnegie Mellon University
1997 - Computer Engineering at Turkish Naval Academy

Best and Brightest

Wed, 18 Oct 2006 20:02:00 GMT

From "2006, the Best and Brightest, Forty under Forty", in the October edition of Georgia Trend magazine (p.30), by Shannon Wilder.

Raheem Beyah, Ph.D.

29
Assistant Professor
Georgia State University
Adjunct Assistant Professor
Georgia Tech
Atlanta

The first African-American tenure track professor in Georgia State's Computer Science Department, Raheem Beyah has made it his mission to bridge the digital divide, the gap between the community technology haves and have-nots.
Through his research and his teaching of the next generation of scientists, Beyah hopes to weave a vast and secure communication web, "the ubiquitous computing that everybody will want at some point," he says. "Developing the protocol of the future."
Beyah, who grew up in Atlanta, was only 26 when he earned his doctorate in 2003, one of a national-record 16 African-Americans to earn engineering Ph.D.s that year at Georgia Tech, where he manages industry research projects at the School of Electrical and Computer Engineering.
A member of the FACES program (a national initiative to increase the presence of underrepresented minorities in science and engineering), Beyah has been selected for the L.E.A.D. Atlanta Class of 2007. - JG

Secure Mobile IP Firewall Traversal

Wed, 16 Aug 2006 19:03:00 GMT

From: Mobile IPv4 Secure Firewall Traversal with Deployment of Foreign Agents by Jin Tang and John A. Copeland

Currently Mobile IP can enable mobile users to enjoy seamless roaming. However if home networks are firewall-protected, mobile users can not access their home networks without successful authentication. So mobile users are out of contact with their home agents and then get lost to some extent. In this paper we consider the case that, in Mobile IPv4, a mobile node away from home obtains a care-of address from a foreign agent and communicates with its home agent and a correspondent node that are both behind the firewall of the home network. Our solution can achieve successful firewall traversal as well as end-to-end security by applying IPsec mechanisms on network entities. It does not require any modification of protocols and network entities. Besides, if foreign agents are deployed hierarchically, the security associations do not need to be renegotiated whenever a mobile node changes its network attachment point.

Schedule

Wed, 16 Aug 2006 18:22:00 GMT

Date	Speaker	Topic
8/22
8/29
9/5
9/12
9/26
-	-	-
10/3
10/10
10/17
10/24
10/31
-	-	-
11/7
11/14
11/21
11/28
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Jian Liu

Mon, 15 May 2006 19:13:00 GMT

Contact Information

Email: gt7876d@gmail.com
Webpage: http://www.prism.gatech.edu/~gt7876d/

Research Goals

Currently Internet traffic exhibits burstiness in multiple timescales. With this property it is difficult to quantify traffic and allocate the bandwidth efficiently. The objective of this research is to improve network performance based on the characterization of data network traffic processes using statistical fractal theory.

Current Research

Characterize fractal network traffic processes using self-similar wavelet analysis and multifractal analysis
Develop an Efficient Bandwidth scheme that is more accurate to estimate the bandwidth for fractal network traffic processes
Enhance network efficiency and application performance through multiscaled fractal traffic analysis

Education

Expected August 2006 - PhD Electrical and Computer Enginnering at Georgia Institute of Technology
2000 - MS Electrical and Computer Enginnering at Georgia Institute of Technology
1991 - BS Electrical Engineering at Changchun Institute of Optics and Fine Machinery, China

Publications

Jian Liu, John A.Copeland, "Comparison of Web and KAZAA Traffic on Self-similarity: A Case Study," IASTED CSA 2004, Banff, Canada.
Jian Liu, Raheem Beyah and John Copeland, "Implementation of an Efficient Transport Scheme for Real-Time Game Applications on HFC Cable Networks," Proc. Of IEEE ICC 2003, Alaska, USA, May 2003.
Xiaotong Zhuang, Jian Liu, "WRAPS scheduling and its efficient implementation on network processors," Proc. Of HIPC 2001, Bangalore, India, Dec. 2001.
Jian Liu, "Performance Analysis of Video Encoding using H.264/AVC," Technical Report, Scientific Atlanta PROPRIETARY, December 2003.
Jian Liu, Raheem Beyah, and John Copeland, "Design and Simulation on Reliable UDP". Technical Report, Scientific Atlanta PROPRIETARY, May 2002.
Jian Liu, Raheem Beyah, and John Copeland, "Data Analysis for Kodak Photo Application on a Digital Cable System", Technical Report, Scientific Atlanta PROPRIETARY, October 2001.

SiteTitle

Mon, 15 May 2006 11:05:00 GMT

Communications Systems Center

Rogue AP Detection

Wed, 08 Mar 2006 22:48:00 GMT

From: Rogue Access Point Detection using Temporal Traffic Characteristics by Raheem Beyah, Shantanu Kangude, George Yu, Brian Strickland, and John Copeland

As the cost of 802.11 hardware continues to fall, the appeal of inserting unauthorized wireless access into enterprise networks grows. These rogue access points (APs) expose the enterprise network to a barrage of security vulnerabilities in that they are typically connected to a network port behind the firewall. Most of the current approaches to detecting rogue APs are rudimentary and are easily evaded by hackers. We propose the use of temporal traffic characteristics to detect rogue APs at a central location. This detection is independent of the wireless technology (802.11a, 802.11b, or 802.11g), is scalable, does not posses the inefficiencies of the current solutions, and is independent of the signal range of the rogue APs.