Roger Dingledine, born April 22, 1977, is an American computer scientist best known as a co-founder and chief engineer of the Tor Project, a nonprofit organization that develops the Tor anonymity network to promote online privacy and resist censorship. He graduated from the Massachusetts Institute of Technology (MIT) with Bachelor of Science degrees in mathematics and computer science and engineering, as well as a Master of Engineering in electrical engineering and computer science in 2000. Dingledine is widely recognized by his online pseudonym 'arma' and has served in key leadership roles at the Tor Project, including Project Leader, Director, and Research Director, with the latter roles documented as of December 2016. His contributions have made Tor an essential tool for activists, journalists, and dissidents worldwide, enabling secure communication in repressive environments. He has been interviewed by journalists such as Andy Greenberg and appeared in documentaries like HAK_MTL and Risk. His work extends to related projects such as Freehaven, focusing on censorship-resistant publishing and anonymity research. As a prominent figure in digital privacy advocacy, Dingledine continues to influence the field of computer security and human rights technology through his technical expertise and public engagement.