Roger Dingledine is president and co-founder of the Tor Project, a nonprofit that develops free and open source software to protect people from tracking, censorship, and surveillance online.

Wearing one hat, Roger works with journalists and activists on many continents to help them understand and defend against the threats they face. Wearing another, he is a lead researcher in the online anonymity field, coordinating and mentoring academic researchers working on Tor-related topics. Since 2002 he has helped organize the yearly international Privacy Enhancing Technologies Symposium (PETS).

Among his achievements, Roger was chosen by the MIT Technology Review as one of its top 35 innovators under 35, he co-authored the Tor design paper that won the Usenix Security "Test of Time" award, and he has been recognized by Foreign Policy magazine as one of its top 100 global thinkers.

Twitter: @RogerDingledine