Andy Müller-Maguhn (born 3 October 1971) is a member of the German hacker association Chaos Computer Club (CCC).

[4][non-primary source needed] In 2005 and 2006, Müller-Maguhn was involved on the side of the parents of the deceased hacker Boris Floricic, better known as Tron, in the case where they sought to prevent German Wikipedia from disclosing his true name, although the name had appeared in many press accounts by that point in time.

His work has taken him around the world, including Moscow, where he attended a security conference organized by the Russian Ministry of Defence in 2016 and 2017, London and Brazil.

[6] In July 2016, on the same day "Guccifer 2.0" sent Wikileaks encrypted files, Müller-Maguhn and Wau Holland board member Bernd Fix met with Assange for over four hours.

[13] He is a contributor to Julian Assange's 2012 book Cypherpunks: Freedom and the Future of the Internet along with Jacob Appelbaum and Jérémie Zimmermann.