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kc claffy is founder and director of the Cooperative Association
for Internet Data Analysis (CAIDA), based at the University of
California's San Diego Supercomputer Center, and
Adjunct Professor in the Computer Science and Engineering
Department at UCSD. kc's research interests include measurement,
analysis, and visualization of Internet workload, routing,
topology and performance data. CAIDA seeks, through the
collection and curation of strategic Internet data sets and
freely available tools and analysis methodologies, to improve
the scientific integrity of network research and to promote
more informed engineering, business, and policy decisions
regarding the Internet infrastructure. kc received her Ph.D.
in Computer Science from UCSD in 1994.
Curriculum Vitae
kc claffy
kc@ucsd.edu
La Jolla, California 92093-0505
University of California's San Diego Supercomputer Center (SDSC)Cooperative Association for Internet Data Analysis (CAIDA)
University of California, San Diego (UCSD)
La Jolla, CA 92093
Education
- Ph.D. 1994. Computer Science and Engineering, UCSD (Advisor: Dr. George Polyzos)
- M.S. 1991. Computer Science and Engineering, UCSD
-
B.S. 1989. Symbolic Systems, Stanford University
- Dissertation topic: Internet traffic characterization: a methodology to support more accurate workload characterization in the face of increasing diversity in Internet traffic types and qualities
Professional Positions
- Adjunct Professor, Computer Science and Engineering, UCSD (2007-present)
- Research Scientist, SDSC (2007-present)
- Associate Adjunct Professor, Computer Science and Engineering, UCSD (2004-2007)
- Associate Research Scientist, SDSC (1994-2007)
-
Director and Principal Investigator (PI), CAIDA, UCSD/SDSC (1997-present)
- Charted to foster development of tools and analysis methodologies for promoting the engineering and maintenance of a robust, scalable global Internet infrastructure.
- Instructor, UCSD Computer Science and Engineering (1996)
-
Research Coordinator, National Laboratory and Applied Network Research (NLANR), SDSC (1995-1998)
- Charted to provide technical, engineering, and traffic analysis support of NSF High Performance Connections sites.
- Associate Staff Scientist, SDSC (1994-present)
- Student Fellow, SDSC (1991-1994)
- Research Assistant, Computer Science and Engineering, UCSD (1989-1994)
-
Visiting Researcher, Sony Computer Science Laboratory, Tokyo, Japan (1991)
- Network protocol research and design; wide area network statistical modeling, measurement, and analysis
-
Summer Research Intern, Monetary Affairs, Monetary Studies Section, Federal Reserve Board (1989)
- Econometric research and programming for the development of a non-linear modeling application for the simulation of macroeconomic indicators
-
Summer Research Intern, Artificial Intelligence Principles Research, AT&T Bell Laboratories (1987)
- Knowledge based user interfaces using plan recognition techniques
-
Summer Research Intern, Advanced Sensor Systems, Harry Diamond Laboratories (1986-1987)
- Natural language processing research; design of extensive Backus Naur grammar in MRS (language written at Stanford) and later in Symbolics Prolog and Lisp
-
Summer Research Intern, Counter Measures, Harry Diamond Laboratories (1985)
- Graphics programming and debugging for aircraft simulation graphics interface programs
Publications
| Year | Month | Author(s) | Title | Publication |
|---|---|---|---|---|
| 2012 | Jan |
|
Extracting benefit from harm: using malware pollution to analyze the impact of political and geophysical events on the Internet | ACM SIGCOMM Computer Communication Review (CCR) |
| 2012 | Jan |
|
Issues and future directions in traffic classification | IEEE Network |
| 2011 | Nov |
|
Analysis of Country-wide Internet Outages Caused by Censorship | Internet Measurement Conference (IMC) |
| Year | Month | Author(s) | Title | Publication |
|---|---|---|---|---|
| 2011 | Oct |
|
Border Gateway Protocol (BGP) and Traceroute Data Workshop Report | Cooperative Association for Internet Data Analysis (CAIDA) |
| 2011 | Jul |
|
Internet measurement data management challenges | Workshop on Research Data Lifecycle Management |
| 2011 | Jul |
|
The 3rd Workshop on Active Internet Measurements (AIMS-3) Report | ACM SIGCOMM Computer Communication Review (CCR) |
| 2011 | Jul |
|
Tracking IPv6 Evolution: Data We Have and Data We Need | ACM SIGCOMM Computer Communication Review (CCR) |
| 2011 | May |
|
Internet-Scale IPv4 Alias Resolution with MIDAR: System Architecture - Technical Report | Cooperative Association for Internet Data Analysis (CAIDA) |
| 2011 | May |
|
Geocompare: a comparison of public and commercial geolocation databases - Technical Report | Cooperative Association for Internet Data Analysis (CAIDA) |
| 2011 | Jan |
|
Measured Impact of Crooked Traceroute | ACM SIGCOMM Computer Communication Review (CCR) |
| 2010 | Sep |
|
The ISMA 2010 AIMS-2 - Workshop on Active Internet Measurements Report | ACM SIGCOMM Computer Communication Review (CCR) |
| 2010 | Apr |
|
Understanding and preparing for DNS evolution | Traffic Monitoring and Analysis Workshop (TMA) |
| 2010 | Apr |
|
Workshop on Internet Economics (WIE2009) Report | ACM SIGCOMM Computer Communication Review (CCR) |
| 2010 | Apr |
|
Toward Topology Dualism: Improving the Accuracy of AS Annotations for Routers | Passive and Active Network Measurement Workshop (PAM) |
| 2010 | Mar |
|
Dialing privacy and utility: a proposed data-sharing framework to advance Internet research | IEEE Security & Privacy |
| 2010 | Mar |
|
Estimating Routing Symmetry on Single Links by Passive Flow Measurements | ACM 1st International Workshop on TRaffic Analysis and Classification (TRAC) |
| 2010 | Mar |
|
Evolution of the Internet AS-Level Ecosystem | European Physical Journal B |
| 2009 | Nov |
|
Understanding the Efficacy of Deployed Internet Source Address Validation Filtering | Internet Measurement Conference (IMC) |
| 2009 | Oct |
|
GT: picking up the truth from the ground for Internet traffic | ACM SIGCOMM Computer Communication Review (CCR) |
| 2009 | Oct |
|
The Workshop on Active Internet Measurements (AIMS) Report | ACM SIGCOMM Computer Communication Review (CCR) |
| 2009 | Oct |
|
An Internet Data Sharing Framework For Balancing Privacy and Utility | Engaging Data: First International Forum on the Application and Management of Personal Electronic Information |
| 2009 | Mar |
|
Internet Mapping: from Art to Science | IEEE DHS Cybersecurity Applications and Technologies Conference for Homeland Security (CATCH) |
| 2009 | Feb |
|
Evolution of the Internet AS-Level Ecosystem | International Conference on Complex Sciences (Complex) |
| 2009 | Jan |
|
Navigability of Complex Networks | Nature Physics |
| 2008 | Dec |
|
Internet Traffic Classification Demystified: Myths, Caveats, and the Best Practices | ACM SIGCOMM CoNEXT |
| 2008 | Oct |
|
Influence Maps - a novel 2-D visualization of massive geographically distributed data sets | Internet Protocol Forum |
| 2008 | Oct |
|
A Day at the Root of the Internet | ACM SIGCOMM Computer Communication Review (CCR) |
| 2008 | Aug |
|
Ten Things Lawyers Should Know About Internet Research | Cooperative Association for Internet Data Analysis (CAIDA) |
| 2008 | Jul |
|
The COMMONS Initiative: Cooperative Measurement and Modeling of Open Networked Systems | CommLaw Conspectus |
| 2007 | Jul |
|
On Compact Routing for the Internet | ACM SIGCOMM Computer Communication Review (CCR) |
| 2007 | May |
|
The (un)Economic Internet? | IEEE Internet Computing |
| 2007 | Apr |
|
Two Days in the Life of the DNS Anycast Root Servers | Passive and Active Network Measurement Workshop (PAM) |
| 2007 | Jan |
|
The Workshop on Internet Topology (WIT) Report | ACM SIGCOMM Computer Communication Review (CCR) |
| 2007 | Jan |
|
AS Relationships: Inference and Validation | ACM SIGCOMM Computer Communication Review (CCR) |
| 2006 | Nov |
|
Approche Récursive d'Etiquetage des Chemins Alternatifs au Niveau IP | Colloque Francophone d'Ingénierie des Protocoles (CFIP) |
| 2006 | Oct |
|
Evaluation of a Large-Scale Topology Discovery Algorithm | 6th IEEE International Workshop on IP Operations & Management |
| 2006 | Oct |
|
A Day in the Life of the Internet: Proposed community-wide experiment | ACM SIGCOMM Computer Communication Review (CCR) |
| 2006 | Jul |
|
The Windows of Private DNS Updates | ACM SIGCOMM Computer Communication Review (CCR) |
| 2006 | Apr |
|
Community-Oriented Network Measurement Infrastructure (CONMI) Workshop Report | ACM SIGCOMM Computer Communication Review (CCR) |
| 2006 | Mar |
|
Implementation and Deployment of a Distributed Network Topology Discovery Algorithm | arXiv cs.NI/060362 |
| 2006 | Mar |
|
Revealing the Autonomous System Taxonomy: The Machine Learning Approach | Passive and Active Network Measurement Workshop (PAM) |
| 2006 | Jan |
|
The Internet AS-Level Topology: Three Data Sources and One Definitive Metric | ACM SIGCOMM Computer Communication Review (CCR) |
| 2005 | Oct |
|
The Internet Measurement Data Catalog | ACM SIGCOMM Computer Communication Review (CCR) |
| 2005 | Aug |
|
Classifying the Types of Autonomous Systems in the Internet | SIGCOMM 2005 Poster |
| 2005 | Aug |
|
Impact of Degree Correlations on Topology Generators | SIGCOMM 2005 Poster |
| 2005 | Jun |
|
Lessons from Three Views of the Internet Topology: Technical Report | Cooperative Association for Internet Data Analysis (CAIDA) |
| 2005 | May |
|
Inferring AS Relationships: Dead End or Lively Beginning? | 4th Workshop on Efficient and Experimental Algorithms (WEA) |
| 2005 | May |
|
Remote physical device fingerprinting | IEEE Transactions on Dependable and Secure Computing |
| 2005 | Mar |
|
A Study of Burstiness in TCP Flows | Passive and Active Network Measurement Workshop (PAM) |
| 2005 | Mar |
|
Comparison of Public End-to-End Bandwidth Estimation Tools on High-Speed Links | Passive and Active Network Measurement Workshop (PAM) |
| 2005 | Mar |
|
Spectroscopy of traceroute delays | Passive and Active Network Measurement Workshop (PAM) |
| 2004 | Dec |
|
Is P2P dying or just hiding? | Global Internet and Next Generation Networks |
| 2004 | Oct |
|
Transport Layer Identification of P2P Traffic | Internet Measurement Conference (IMC) 2004 |
| 2004 | Apr |
|
Measurements and Laboratory Simulations of the Upper DNS Hierarchy | Passive and Active Network Measurement Workshop (PAM) |
| 2004 | Apr |
|
Their share: diversity and disparity in IP traffic | Passive and Active Network Measurement Workshop (PAM) |
| 2004 | Mar |
|
The RTT distribution of TCP flows on the Internet and its impact on TCP based flow control | Cooperative Association for Internet Data Analysis (CAIDA) |
| 2004 | Feb |
|
Beyond CIDR Aggregation | Cooperative Association for Internet Data Analysis (CAIDA) |
| 2003 | Aug |
|
Radon Spectroscopy of Packet Delay | International Teletraffic Congress 18 |
| 2003 | Jun |
|
Spectroscopy of DNS Update Traffic | SIGMETRICS 2003 Poster |
| 2003 | Jun |
|
Spectroscopy of DNS Update Traffic | Workshop on Internet Applications (WIAPP) 2003 |
| 2003 | Apr |
|
On Third-party Addresses in Traceroute Paths | Passive and Active Network Measurement Workshop (PAM) |
| 2003 | Apr |
|
Bandwidth estimation: metrics, measurement techniques, and tools | IEEE Network |
| 2003 | Apr |
|
On the problem of optimization of DNS root servers' placement | Passive and Active Network Measurement Workshop (PAM) |
| 2003 | Mar |
|
Traceroute and BGP AS Path Incongruities | Cooperative Association for Internet Data Analysis (CAIDA) |
| 2003 | Mar |
|
Radon spectroscopy of inter-packet delay | IEEE High-speed networking workshop |
| 2003 | Jan |
|
Longitudinal study of Internet traffic from 1998-2003 | Winter International Symposium on Information and Communication Technologies (WISICT) 2004 |
| 2003 | Jan |
|
Wide-Area IP Multicast Traffic Characterization | IEEE Network |
| 2002 | Dec |
|
Beyond Folklore: Observations on Fragmented Traffic | IEEE/ACM Transactions on Networking |
| 2002 | Sep |
|
Distance Metrics in the Internet | IEEE International Telecommunications Symposium (ITS) |
| 2002 | Jul |
|
Understanding Internet Traffic Streams: Dragonflies and Tortoises | IEEE Communications |
| 2002 | Jan |
|
Internet Expansion, Refinement, and Churn | European Transactions on Telecommunications |
| 2002 | Jan |
|
Topology discovery by active probing | Symposium on Applications and the Internet (SAINT) |
| 2001 | Dec |
|
DNS Root/gTLD Performance Measurements | Usenix LISA |
| 2001 | Dec |
|
CoralReef software suite as a tool for system and network administrators | Usenix LISA |
| 2001 | Dec |
|
Macroscopic Internet Topology and Performance Measurements From the DNS Root Name Servers | Usenix LISA |
| 2001 | Nov |
|
Characteristics of Fragmented Traffic on Internet Links | Internet Measurement Workshop (IMW) 2001 |
| 2001 | Nov |
|
DNS Measurements at a Root Server | IEEE Global Telecommunications Conference (GLOBECOM) |
| 2001 | Aug |
|
Internet topology: connectivity of IP graphs | SPIE International Symposium on Convergence of IT and Communication |
| 2001 | Jul |
|
Complexity of global routing policies | Cooperative Association for Internet Data Analysis (CAIDA) |
| 2001 | May |
|
Analysis of RouteViews BGP data: policy atoms | Network Resource Data Management Workshop |
| 2001 | Apr |
|
Measuring the Immeasurable: Global Internet Measurement Infrastructure | Passive and Active Network Measurement Workshop (PAM) |
| 2001 | Apr |
|
Macroscopic analyses of the infrastructure: measurement and visualization of Internet connectivity and performance | Passive and Active Network Measurement Workshop (PAM) |
| 2001 | Apr |
|
Characteristics of fragmented IP traffic on Internet links | Passive and Active Network Measurement Workshop (PAM) |
| 2001 | Apr |
|
Methodology for passive analysis of a university Internet link | Passive and Active Network Measurement Workshop (PAM) |
| 2001 | Apr |
|
The architecture of CoralReef: an Internet traffic monitoring software suite | Passive and Active Network Measurement Workshop (PAM) |
| 2001 | Mar |
|
Traffic dynamics testbed | Large Scale Networking (LSN) Workshop |
| 2001 | Jan |
|
CAIDA: Visualizing the Internet | Internet Computing Online |
| 2000 | Dec |
|
A scalable architecture for monitoring and visualizing multicast statistics | Distributed Systems: Operations and Management |
| 2000 | Sep |
|
Trends in wide area IP traffic patterns - A view from Ames Internet Exchange | ITC Specialist Seminar |
| 2000 | Jul |
|
The Internet Engineering Curriculum Repository | International Networking Conference (INET) '00 |
| 2000 | Jul |
|
Measurements of the Internet topology in the Asia-Pacific Region | International Networking Conference (INET) '00 |
| 2000 | Jul |
|
Where in the world is netgeo.caida.org? | International Networking Conference (INET) '00 |
| 2000 | Jan |
|
Measuring the Internet | IEEE Internet Computing |
| 1999 | Aug |
|
Internet measurement and data analysis: passive and active measurement | American Statistical Association |
| 1999 | Jun |
|
Tools to visualize the Internet multicast backbone | International Networking Conference (INET) '99 |
| 1999 | Jun |
|
Otter: A general-purpose network visualization tool | International Networking Conference (INET) '99 |
| 1999 | Mar |
|
Internet measurement and data analysis: topology, workload, performance and routing statistics | National Academy of Engineering (NAE) '99 Workshop |
| 1999 | Jan |
|
Internet Tomography | Nature |
| 1998 | Jul |
|
The nature of the beast: Recent traffic measurements from an Internet backbone | International Networking Conference (INET) '98 |
| 1998 | Jun |
|
Visualization of the growth and topology of the NLANR caching hierarchy | 3rd International WWW Caching Workshop |
| 1998 | Mar |
|
ICP and the Squid web cache | IEEE Journal on Selected Areas in Communications |
| 1997 | Oct |
|
What's next for Internet data analysis? Status and challenges facing the community | Proceedings of the IEEE |
| 1997 | Sep |
|
IETF RFC 2187: Application of Internet Cache Protocol (ICP), version 2 | Internet Engineering Task Force (IETF) |
| 1997 | Sep |
|
IETF RFC 2186: Internet Cache Protocol (ICP), version 2 | Internet Engineering Task Force (IETF) |
| 1997 | Mar |
|
Internet data acquisition and analysis: Status and next steps | National Laboratory for Applied Network Research (NLANR) |
| 1996 | Nov |
|
Evolution of the NLANR cache hierarchy: Global configuration challenges | National Laboratory for Applied Network Research (NLANR) |
| 1996 | Oct |
|
Visualizing the global topology of the MBone | IEEE Symposium on Information Visualization |
| 1996 | Oct |
|
Address administration in IPv6 | 1996 IEEE Symposium on Information Visualization |
| 1996 | Sep |
|
In whose domain: name service in adolescence | Coordination and Administration of the Internet Workshop |
| 1996 | Sep |
|
Cooperation in Internet data acquisition and analysis | Coordination and Administration of the Internet Workshop |
| 1996 | Aug |
|
"But some data is worse than others": Measurement of the global Internet | National Laboratory for Applied Network Research (NLANR) |
| 1996 | Jun |
|
A survey of Internet statistics / metrics activities | National Laboratory for Applied Network Research (NLANR) |
| 1996 |
|
Geographic addressing reconsidered | Coordination and Administration of the Internet Workshop | |
| 1995 | Jun |
|
Post-NSFNET statistics collection | International Networking Conference (INET) '95 |
| 1995 | Jun |
|
Measured interference of security mechanisms with network performance | International Networking Conference (INET) '95 |
| 1995 | Mar |
|
A parameterizable methodology for Internet traffic flow profiling | IEEE Journal on Selected Areas in Communications |
| 1994 | Nov |
|
Mitigating the coming Internet crunch: multiple service levels via Precedence | National Laboratory for Applied Network Research (NLANR) |
| 1994 | Oct |
|
Web traffic characterization: an assessment of the impact of caching documents from the NCSA's web server | Second International World Wide Web (WWW) Conference '94 |
| 1994 | Apr |
|
Applied Network Research: 1994 annual status report | Applied Network Research, San Diego Supercomputer Center |
| 1994 | Mar |
|
Tracking long-term growth of the NSFNET | Communications of the ACM |
| 1994 | Mar |
|
Internet traffic flow profiling | Applied Network Research, San Diego Supercomputer Center |
| 1994 |
|
Internet traffic characterization. | UC San Diego | |
| 1993 | Dec |
|
1993 annual report of the research progress of the Applied Network Research (ANR) group at SDSC | Applied Network Research, San Diego Supercomputer Center |
| 1993 | Sep |
|
Measurement considerations for assessing unidirectional latencies | Journal of Internetworking |
| 1993 | Sep |
|
A framework for flow-based accounting on the Internet | IEEE Singapore International Conference on Networks (SICON) |
| 1993 | May |
|
Network analysis issues for a public Internet | Public Access to the Internet, A Harvard JFK School Workshop |
| 1993 | May |
|
Long-term traffic aspects of the NSFNET | International Networking Conference (INET) |
| 1993 | May |
|
Application of sampling methodologies to wide-area network traffic characterization | SIGCOMM 1993 |
| 1993 | May |
|
Network analysis in support of Internet policy requirements | International Networking Conference (INET) '93 |
| 1993 | Jan |
|
Traffic characteristics of the T1 NSFNET backbone | IEEE Conference on Computer Communications (INFOCOM) |
| 1992 | Dec |
|
1992 annual report of the research progress of the Applied Network Research (ANR) group at SDSC | Applied Network Research, San Diego Supercomputer Center |
| 1992 | Jan |
|
An analysis of international academic research network traffic between Japan and other nations | International Networking Conference (INET) |
Synergistic Activities
- CANN's Security and Stability Advisory Committee
- Collaborating with ARIN (American Registry for Internet Numbers) on analysis of IPv4 address exhaustion and IPv6 usage.
- Internet2 Research Advisory Council member
- Regularly invited speaker at conferences, workshops, and operational meetings: AUSCert, SANE, NANOG, RIPE, ARIN, CENIC, QUILT, OECD, ISOC, IBM, NLR, Google, Usenix, LISA, Terena
- Regularly communicates with U.S. federal agencies regarding the Internet as critical infrastructure: DHS, NIST, NCS/DISA, DARPA, FCC, FTC, OSTP, NSA, GAO, NSF
Recent Collaborators
- Dhiman Barman, UCR
- Robert Beverly, MCI/WorldCom
- Marián Boguñá, U. e Barcelona, Spain
- Scott Bradner, Harvard U.
- Arthur Brady, Tufts University
- Andre Broido, Google
- Nevil Brownlee, Univ. of Auckland, NZ
- Sebastian Castro Avila, U. of Chili
- Kenjiro Cho, IIJ Research Laboratory
- Fay Chung, UCSD
- Mark Crovella, Boston University
- Alberto Dainotti, Universit degli Studi di Napoli Federico II, Italy
- Xenofontas Dimitropoulos, IBM Zurich
- Benoit Donnet, U. Pierre & Marie Curie, France
- Constantinos Dovrolis, GA Tech
- Maurizio Dusi, U. of Brescia, Italy
- Kevin Fall, Intel Corporation / UC Berkeley
- Michalis Faloutsos, UC Riverside
- Marina Fomenkov, UC San Diego
- Timur Friedman, Université Pierre et Marie Curie
- Minas Gjoka, UCI
- Yihua He, UCR
- Bradley Huffaker, UC San Diego
- Young Hyun, UC San Diego
- Almerima Jamakovic, Delft U. of Technology, The Netherlands
- Wolfgang John, Chalmers Univ. of Technology, Sweden
- Thomas Karagiannis, Mircosoft Research
- Egemen Kavak, U. of Penn
- Ken Keys, UC San Diego
- Hyunchul Kim, Seoul National U., South Korea
- Todoyoshi Kohno, Univ. of Washington
- Dmitri Krioukov, UC San Diego
- Ritesh Kumar, U. of NC-Chapel Hill
- Raymond Liu, UCLA
- Ziqian Liu, Beijing Jiaotong Univ.
- Priya Mahadevan, UCSD
- Sascha Meinrath, U. of Illinois Urbana-Champaign
- David Moore, IronPort Systems
- Margaret Murray, U. Texas
- Fragkiskos Papadoupolos, UCR
- Ravi Prasad, GA Tech
- George Riley, GA Tech
- Srinivas Shakkottai, U. of Illinois Urbana-Champaign
- Alok Shiram, U. of NC-Chapel Hill
- Hao Shang, Google
- Colleen Shannon, Nominum, Inc.
- Neil Spring, Univ. of Maryland
- Jeff Terrell, U. of NC-Chapel Hill
- Amin Vahdat, UC San Diego
- Alex Vespigniani, Indiana U.
- Thomas Vest, Univ of South Carolina
- Paul Vixie, Internet Systems Consortium
- Bhavjit Walha, UCSD
- Duane Wessels, The Measurement Factory
- Walter Willinger, AT&T Research
- Min Zhang, Beijing Jiaotong Univ.