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" ... In 1983, a curious teenager named David Lightman found a backdoor in a military computer system and very nearly caused the United States to start a nuclear war. If this sounds familiar, it isn’t because it happened in real life. This was the plot of a movie called War Games, and it very realistically portrayed some common hacking techniques of the day like war dialing and phone phreaking. What was most surprising about this movie was that, unlike some science fiction movies, the problems it described were real and needed immediate solutions. But it would take five years for the first theoretical paper to be published on a term that would be eventually become well-known outside of the cybersecurity community: the firewall. ... "