PGP (Pretty Good Privacy)

PGP has first been released by Phil Zimmermann in the US with the goal to provide a high level of encryption for everybody. PGP was good enough not to be allowed for export. Phil Zimmermann then provided the algorithms via a printed book which was allowed to export.

Later, PGP became an open standard, named OpenPGP. Countless encryption products around the world follow this standard (some more, some less). One very established implementation is GnuPG which is the groundwork for the Outlook AddIn gpg4o which allows for professional hence easy encryption of emails in Outlook.

PGP as a product line has had a changeful history and belongs now to Symantec. The PGP product line is now known as Symantec Encryption.