TIL: Until the late 90s, it was illegal to export encryption software that used keys over 40 bits in size from the USA. This lead to a criminal investigations of the creator of PGP and others.
TIL: Until the late 90s, it was illegal to export encryption software that used keys over 40 bits in size from the USA. This lead to a criminal investigations of the creator of PGP and others.
Export of cryptography from the United States - Wikipedia

The software was classed as munitions and one needed an arms dealer's license to publish it, including online. The creator of PGP published the full source code as a book, as these are covered under first amendment rights.
Yes, that was indeed a very interesting story:
(Source)
Yep, we called them crypto wars
Zimmerman flew, and Tyler knew!