My research interests are in network measurement and anti-abuse for improved stability and security of the Internet. I lead the Internet Measurement and Anti-Abuse Laboratory (IMAAL). Our research includes (but is not limited to) the following areas:

  • DNS/DNSSEC deployment and measurement
  • IPv6 deployment and measurement
  • DDoS prevention and mitigation techniques


Recent Publications

Conference Proceedings

  • "Quantifying and Improving DNSSEC Availability." C. Deccio, J. Sedayao, K. Kant, P. Mohapatra. ICCCN 2011.
  • "Measuring Availability in the Domain Name System." C. Deccio, J. Sedayao, K. Kant, P. Mohapatra. IEEE INFOCOM 2010.
  • "Quality of Name Resolution in the Domain Name System." C. Deccio, C. Chen, J. Sedayao, K. Kant, P. Mohapatra. IEEE ICNP 2009.
  • "A Study of the Suitability of IrOBEX for High-Speed Exchange of Large Data Objects." C. Deccio, J. Ekstrom, C. Knutson, D. R. Partridge, K. Tew. GLOBECOM 2003.

Journal Articles

  • "Maintenance, Mishaps and Mending in Deployments of the Domain Name System Security Extensions (DNSSEC)." C. Deccio. International Journal of Critical Infrastructure Protection. Jul 2012.
  • "Quantifying DNS Namespace Influence." C. Deccio, J. Sedayao, K. Kant, P. Mohapatra. Computer Networks. Feb 2012.

Books and Book Chapters

  • "Security and Robustness in the Internet Infrastructure." K. Kant, C. Deccio. In Handbook on Securing Cyber-Physical Critical Infrastructure. Morgan Kaufman (2012), Waltham, MA. pp. 705-733.
  • Quantifying and Improving DNS Availability. PhD Dissertation. University of California Davis, 2010.


  • CS 460 - Fall 2017
  • CS 360 - Winter 2017


Dr. Casey Deccio is an Assistant Professor in the Computer Science Department at Brigham Young University (BYU). He earned B.S. and M.S. degrees in Computer Science from BYU in 2002 and 2004, respectively, and received a Ph.D. from UC Davis, in Computer Science, in 2010.

Prior to coming to BYU, Dr. Deccio was a Senior Research Scientist at Verisign Labs since 2014, where his research included DNS ecosystem tools, monitoring, measurement, and modeling, with the objective of increasing stability, security, and safety of the Internet. Before that he was a Principal Research and Development Cyber Security Staff member at Sandia National Laboratories, where he had been employed since 2004 and where he was responsible for network-related research and development, including DNSSEC and IPv6 deployment efforts. While at Sandia he developed DNSViz, the widely used tool for DNS analysis and visualization. He also served as an ICANN Research Fellow supporting the Security and Stability Advisory Committee (SSAC) in 2013.

Outside of work, he enjoys making music and participating in recreational activities with his wife and five children.


I sing barbershop with a number of BYU Computer Science students in a group called Sing++. Here is a musical tribute to my CS 360 class.