His research interests center around operating systems, security, and privacy. He is currently investigating such problems as network file system performance over low-bandwidth networks, secure data storage on untrusted servers, censorship-resistant publishing, scalable, robust, low-latency peer-to-peer systems, and global, cross-realm user authentication without global trust. Prof. Mazières received a Ph.D. in 2000 from MIT, where among other things he built xok, the kernel of an exokernel operating system, and nym.alias.net, an email pseudonym server. His thesis was on SFS, a secure, global file system with decentralized control. Prof. Mazières is the recent recipient of an Alfred P. Sloan research fellowship.