Download or read book The Official PGP User's Guide written by Philip R. Zimmermann and published by MIT Press (MA). This book was released on 1995 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because cryptographic software is considered munitions by the U.S. government, and is thus subject to the same export restrictions as tanks and submarines, the worldwide distribution of PGP over the Internet has raised a host of issues that are addressed in the "User's Guide.".