encryption technology.
Edited to add:
Phil Zimmerman’s motive for creating the program was political and not for profit.(15) Zimmerman believes that the intrinsic susceptibility of digital communications to automated mass-surveillance is an unprecedented threat to civil liberties(16) and wishes to provide the public with a secure means of communication. The program has been used by human rights monitors inside countries with repressive political regimes, but also by criminals to conceal evidence.(17)
The disclosure or transfer of cryptographic software to a foreigner is illegal under the US ITAR (18) export regulations. Zimmerman never personally exported PGP, he created it, encouraged its use and distributed it to friends and colleagues, one of whom posted it to an Internet Usenet discussion group.(19) Later, improved and extended versions were collaboratively produced by other programmers around the world.(20) Zimmerman was put under investigation, with a grand jury hearing evidence for about 28 months. A campaign was established for his defence, and the civil liberties issues achieved wide publicity on the Internet. After acquiring folk-hero status, the prosecution was finally dropped<21> by the Federal Government in January 1996 without explanation. These disputes are now moot, and PGP has become an international de facto standard for Internet public key cryptography. In 1997, the source program of the latest version was published in the form of a book, constitutionally protected under the First Amendment. The book was then scanned outside the US, and the program re-compiled, which allowed distribution of a free version on the Internet, and a “shrink-wrap” version for commercial use.
Source:
Cryptography and Democracy : Dilemmas of Freedom
http://www.fipr.org/rip/Cryptfree.htm(It's a long webpage. Search for the word "motive" to find the above excerpt and the surrounding text/context.)