An underage hacker will break into Pentagon's supercomputer

John Badham : director
This thriller about an underachieving computer whiz (Matthew Broderick) who accidentally hacks into the Pentagon's supercomputer and nearly starts a nuclear war was ahead of its time for its depiction of hacking, government security breaches and computer games.
War Games predicted hacking at a time when the Internet was still a child. Today, a computer security breach can send industries into a panic, making War Games almost prophetic.

War Games (1983)