Note 4

On the Open PGP Alliance, it describes that OpenPGP is a common e-mail encryption standard in the world. Indeed, OpenPGP is a new improvement from the former Pretty Good Privacy (PGP) and from the collaboration of OpenPGP Working Group and Internet Engineering Task group (IETF), they created RFC 2440 standard. This Alliance will help to facilitate technical interoperability of the companies that implement OpenPGP Proposed Standard.

Reference

OpenPGP 2007, last edited n.a., OpenPGP Alliance, California, viewed 5 April 2007, <http://www.openpgp.org/>