Research

Research interests

Internet security: pulsing denial-of-service attacks and countermeasures, network covert channels and countermeasures
Internet measurement: end-to-end measurement, BGP measurement and traffic engineering
Wireless networks: security, measurement, energy efficiency, physical rate adaptation
Network theory: system and queue stability analysis, capacity modeling

"Performance Monitoring and Measurement of HARNET," Funded by the The Joint Universities Computer Centre, January 2009 to December 2009.
"Uncooperative Measurement and Monitoring of Internet Path Quality with Applications," Funded by the Innovation and Technology Commission (under the ITSP tier-three programme), September 2008 to February 2010.
"Analyzing the Impact of Smart Denial-of-Service Attacks on TCP and Queue Management Scheme." Funded by Cisco CCRP, August 2005 to December 2006.
"Area of Excellence in Information Technology (Network Security)." Funded by the University Grants Council of Hong Kong, December 2004 to December 2005.
"BGP-based Inbound Traffic Engineering for Multihomed Autonomous Systems: A Measurement-based Analysis." Funded by The Hong Kong Polytechnic University Central Research Grant, September 2004 to August 2006.
"Early Detection of Flash Crowds: A Nonparametric Approach." Funded by The Hong Kong Polytechnic University Central Research Grant, September 2003 to August 2005.
"A Distributed Detection Approach to Flooding-based Distributed Denial-of-service Attack Prevention." Funded by the Competitive Earmarked Research Grant, December 2002 to November 2005.
"Toward a General Approach to Per-queue Stability Problems with Applications in Wireless Communications." Funded by the Competitive Earmarked Research Grant, December 2001 to November 2004.

Selected publications
Edmond W. W. Chan, Xiapu Luo, and Rocky K. C. Chang, "A Minimum-Delay-Difference Method for Mitigating Cross-Traffic Impact on Capacity Measurement," Proc. ACM CoNext, December 2009. [Paper]
Xiapu Luo, Edmond W. W. Chan and Rocky K. C. Chang, "Design and Implementation of TCP Data Probes for Reliable Network Path Monitoring," Proc. USENIX Annual Tech. Conf., June 2009. [Paper]

Rocky K. C. Chang, "Lessons Learnt from the Beijing Olympic Games Website Measurement," Closing Plenary session, APRICOT, February 2009. [ppt]
Rocky K. C. Chang, "Lessons Learnt from the Beijing Olympic Games Website Measurement," Special session, APNOMS, September 2008. [ppt]
Rocky K. C. Chang, Samantha Lo, and Lorenzo Colitti, "An Active Approach to Measuring Routing Dynamics Induced by Autonomous Systems," A plenary presentation at APRICOT, Taipei, February 2008. [ppt]
Samantha Lo and Rocky K. C. Chang, "Active Measurement of the AS Path Prepending Method," Presented at the NANOG 37, San Jose, June 2006. [Video]

Samantha Lo, Rocky K. C. Chang, and Lorenzo Colitti, "An Active Approach to Measuring Routing Dynamics Induced by Autonomous Systems,'' in Proc. ACM Workshop on Experimental Computer Science, June 2007 [DatCat RIPE RRC07, RIPE RRC14 and RIPE RRC10].