Lixia Zhang received her Ph.D. degree in computer science from the Massachusetts Institute of Technology. As a member of the research staff at Xerox Palo Alto Research Center, she worked on a number of protocols and designs of Internet integrated services support. She joined the computer science department of the University of California at Los Angeles in 1995, where her research started with the design of a global scale Web-caching system, Adaptive Web Caching (AWC), and the Internet Distance Map Service. Her focus has been on the deployed global Internet infrastructure, and she is currently tackling resiliency and security issues in the global routing system and Domain Name System (DNS), and the system challenges in deploying cryptographic protections in global scale open systems such as the Internet. Website: http://www.cs.ucla.edu/~lixia/