In 1998, the NSA required MIT to subborn their PGP. MIT publicly stated that at the time. NSA simultaneously banned the use of MIT's European confederate's version of PGP by U.S. citizens, and blocked access to that university's FTP from the U.S. Naturally, being overseas at the time, I downloaded the European version and, since it allowed creation of up-to 4096-bit keys with the option of manually-specifying non-standard lengths, I created a very large key which I saved to floppy disk.