Due to worry of interference by the National Security Agency, Stone determined to shoot the film outside of the u. s.. "We felt like we have a tendency to were in danger here. we have a tendency to didn’t understand what the United States intelligence agency may do, therefore we have a tendency to finished up in Muenchen, that was an attractive expertise," Stone aforesaid. as a result of fears of the film unseaworthy, Stone utilized "Ethical Hacker" Ralph Echemendia as a technical supervisor and created positive all forged and crew used a secure chat-and-file-sharing program.