Jacob Appelbaum is an independent computer security researcher and hacker. He was employed by the University of Washington, and is a core member of the Tor project, a free software network designed to provide online anonymity. Appelbaum is known for representing Wikileaks at the 2010 HOPE conference.
Appelbaum has been an active member of the Cult of the Dead Cow hacker collective since 2008, and is the co-founder of the San Francisco hackerspace Noisebridge with Mitch Altman. He has worked for Kink.com and Greenpeace, and has volunteered for the Ruckus Society and the Rainforest Action Network. He is also an ambassador for the art group monochrom.