Inventor of onion routing, designer of Tor. Foreign Policy Top 100 Global Thinkers of 2012. Co-founder: Privacy Enhancing Technologies Symposium, ACM Workshop on Privacy in the Electronic Society, and IFIP Working Group 1.7 on Theoretical Foundations of Security Analysis and Design. Past Program Chair: ACM Conference on Computer and Communications Security, IEEE Computer Security Foundations Symposium, IFCA Financial Cryptography and Data Security Conference. Fellow of the ACM.