The software used in this chapter would have once been considered a munition by the U.S. Government. Exporting it without a license from the government, would have violated the International Traffic in Arms Regulations (ITAR). As late as the early 1990s, cryptography was heavily controlled and restricted. While the early 90s are filled with numerous accounts by crypto-activists, all of which are well documented in Steven Levy's Crypto, there is one man in particular who was the driving force behind the software in this project: Philip Zimmerman.

Philip Zimmerman had a small pet project around the year 1990, which he called Pretty Good Privacy. Motivated by a strong childhood passion for codes and ciphers, combined with a sense of political activism against a government capable of strong electronic surveillance, he set out to create a strong encryption program for the people (Levy 2001).

One incident in particular helped to motivate Zimmerman to finish PGP and publish...