Born in Camden, New Jersey and currently residing in the San Fransisco area, Zimmermann created PGP (Pretty Good Privacy) and released it with it's source code on public FTP for download in 1991. The customs service would conduct a criminal investigation against him for possible violation of the Arms Export Control Act as at that point in time cryptographic software was consider a munition. When the government dropped it's case without indictment in 1996, Zimmermann founded PGP Inc.