Jonny Lee Miller and Angelina Jolie were married shortly after the making of the film, and then were divorced four years later.
The character name "Emmanuel Goldstein" is taken from George Orwell's novel "Nineteen Eighty-Four". It is also used as a pseudonym by Emmanuel Goldstein (aka Eric Corley), who publishes the magazine "2600, The Hacker Quarterly". Corley was an uncredited consultant for this film.
The "hacking"-sequences - the scenes where you see the "inside" of a computer - are mostly motion-controlled models, because director Iain Softley thought that actual computer graphics would look too artificial.
The film's writer, director, and some cast members attended the New York City 2600 meeting, a monthly hangout of the local hacker community, to observe and talk with real-life hackers.
Eugene Belford uses the pseudonym Babbage at the end of the film. Charles Babbage was the inventor of an early form of the computer.
