Anonymity
Covert Channel Detection
Traceback and Forensics
Wireless
Multicast
Other
Copyright
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I am interested in
developiong protocols for anonymity that can be used to
protect the privacy of internet users, and the limits of how
effective these protocols can be when used over extended periods of
time.
Publications
- M. Wright, M. Adler, B. N. Levine, and C. Shields,
"Defending Anonymous Communication Against Passive Logging
Attacks". IEEE Symposium on Security and Privacy, Oakland,
CA. May 2003.
- M. Wright, M. Adler, B. N. Levine, and C. Shields, "The Predecessor
Attack: An Analysis of a Threat to Anonymous Communications Systems",
ACM Transactions on Information and System Security,Vol. 7, No. 4, by
invitation.
- M. Wright, M. Adler, B.N. Levine, and C. Shields,"
An Analysis of the Degradation of Anonymous Protocols",
Proceedings of the ISOC Network and Distributed System Security
Symposium (NDSS 2002), February 2002. Received the
Outstanding Paper Award.
- B.N. Levine and C. Shields, "Hordes
- A Multicast Based Protocol for Anonymity", Journal of
Computer Security, Vol. 10, Num. 3, 2002, pp. 213-240, by
invitation.
- V. Scarlata, B.N. Levine, and C. Shields,"
Responder Anonymity and Anonymous Peer-to-Peer File Sharing",
in Proceedings of the IEEE Intl. Conference on Network Protocols
(ICNP) 2001. November 2001.
- C. Shields and B. N. Levine,"
A Protocol for Anonymous Communication Over the Internet",
Proceedings of the 7th ACM Conference on Computer and Communication
Security, November 1-4, 2000, Athens, Greece.
- S. Mandujano and C. Shields,"
Confidentiality and Anonymity Analysis of On-Line Payment
Protocols", Computer Security Congress, November 2000, Mexico
City, Mexico.
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Covert channels are a mechanism for intruders to leak
information in ways that are designed to be difficult to
detect. This area of work is designed to help detect when this is
happening
Publications
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While I am interested in anonymity for the purposes of individual
privacy, I also firmly believe in holding intruders accountable for
their actions. My research in this area focuses on mechanisms to
locate attackers across the internet.
Publications
- B. Carrier and C. Shields, "The
Session Token Protocol for Forensics and Traceback". ACM Transactions on Information and System Security. Vol. 7, No. 3.
- F. Bucholz and C. Shields, "Providing
Process Origin Information to Aid in Computer Forensic
Investigations"Vol. 7, Num. 4, November, 2004.
- B. Carrier and C. Shields, "A
Recursive Session Token Protocol For Use in Computer Forensics and
TCP Traceback", Proceedings of the IEEE INFOCOM 2002, June,
2002, New York, N.Y.
- F. Buchholz and C. Shields, "Providing
Process Origin Information to Aid in Network Traceback",
Proceedings of the 2002 USENIX Annual Technical Conference, June,
2002.
- S. C. Lee and C. Shields, "Technical, Legal, and Societal
Challenges to Automated Attack Traceback", IT Professional, May/June,
202. pp. 12-18.
- S. Lee and C. Shields, "Tracing
the Source of Network Attacks: A Technical, Legal, and Social
Problem." Proceedings of the Second Annual IEEE Systems, Man,
and Cybernetics Information Assurance Workshop, June, 2001, West
Point, N.Y.
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There are clearly a
number of security problems with ad hoc wireless networks. I have
worked on secure ad hoc routing, and plan to address other problems
in the near future.
Publications
- C. Piro, C. Shields, and B. N. Levine, "Detecting the Sybil Attack in Mobile Ad hoc Networks", Proceedings of the Second International Conference on Security and Privacy in Communication Networks (Securecomm), August, 2006.
- K. Sanzgiri, B. Dahill, D. LaFlamme, B. N. Levine,
C. Shields, and E. Belding-Royer,"A
Secure Routing Protocol for Ad Hoc Networks". IEEE Journals on
Selected Areas in Communications Special issue on Wireless Ad hoc
Networks, March, 2005. Note: The copy of the paper linked above
includes a letter providing additional information that was
precluded from the paper by space limitations.
- K. Sanzgiri, B. Dahill, B. N. Levine, C. Shields, and
E. Belding-Royer, "A
Secure Routing Protocol for Ad Hoc Networks", In Proceedings of
2002 IEEE International Conference on Network Protocols (ICNP).
November 2002.
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I no longer am
active in working in multicast, but my past work focused on secure
shared-tree multicast algorithms.
Publications
- C. Shields and J.J. Garcia-Luna-Aceves, "A
Protocol for Hierarchical Multicast Routing", Computer
Communications, Vol:23. Issue: 7, March 13, 2000, pages
628-641.
- C. Shields and J.J. Garcia-Luna-Aceves, "KHIP
- A Scalable Protocol for Secure Multicast Routing", Proc. ACM
SIGCOMM 99, Cambridge, Massachusetts, September 1-3, 1999.
- C. Shields and J.J. Garcia-Luna-Aceves, "The
HIP Protocol for Hierarchical Multicast Routing",
Proc. Seventeenth Annual ACM SIGACT-SIGOPS Symposium on Principles
of Distributed Computing (PODC 98), Puerto Vallarta, Mexico, June
28-July 2, 1998.
- C. Shields and J.J. Garcia-Luna-Aceves, "The
Ordered Core Based Tree Protocol", Proc. IEEE INFOCOM 97, Kobe,
Japan, April 7-11, 1997.
- C. Shields, "Secure
Hierarchical Multicast Routing and Multicast Internet
Anonymity", PhD Thesis, Computer Engineering, University of
California, Santa Cruz, CA 95064, June 1999.
- C. Shields, "Ordered
Core Based Trees", M.S. Thesis, Computer Engineering,
University of California, Santa Cruz, CA 95064, June 1996.
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I also work on other things that interest me.
Publications
- C. Shields. "An
Introduction to Information Assurance." Machine Learning and Data
Mining for Computer Security. Ed. Marcus A. Maloof. London:
Springer, 2005.
- C. Shields,
"Ask the Experts - How can deleted computer files be retrieved at a
later date?". Scientific American, April, 2004.
- C. Shields, "Ask
the Experts - Why do computers crash?". Scientific American,
May, 2003.
- C. Shields, "What
do we mean by Network Denial of Service?", Proceedings of the
2002 IEEE Workshop on Information Assurance and Security, June,
2002, West Point, N.Y.
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