International PGP Home Page -  .

PGP Corporation -  .

DSJ Networks PGP Resources - - A superior collection of PGP annotated resources and links to include books, tutorials, utilities, news, and articles.

Open PGP Alliance - - The OpenPGP Alliance is a growing group of companies and other organizations that are implementers of the OpenPGP standard. The Alliance works to facilitate technical interoperability and marketing synergy between OpenPGP implementations.

PGP Digital Timestamping Service - - Stamper is a free digital timestamping service which uses PGP and operates via Internet email.

PGP pathfinder and key statistics - - Lookup the statistics of your PGP key. The pathfinder finds trust paths between your key and some other key in the PGP web of trust.

PGP Web-of-trust Statistics - - Statistics about the position of all keys within the web-of-trust.

Phil Zimmermann's Home Page - - Phil Zimmermann is the original creator of PGP and a founder of PGP, Inc. This site offers historical PGP background and current resource links.