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OpenPGP is the most widely used email encryption standard. It is defined by the OpenPGP Working Group of the Internet Engineering Task Force (IETF) as a Proposed Standard in RFC 4880. OpenPGP was originally derived from the PGP software, created by Phil Zimmermann.

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  • Press ⌥ ⌘ P to activate PGP or ⌥ ⌘ S to activate S/MIME. Receive secure messages with Mail. The 'Security:' header will tell you, if the message you've received was signed or encrypted. If the message was successfully decrypted, you'll see an open lock. If the signature of the message is valid, you'll see a star icon with a checkmark.
  • Pgp for mac free download. Open PGP Explorer Explore the Open PGP File structure and optionally extract the private key material and encrypted da.

In the Mail app on your Mac, a Security field in the header area indicates whether a message is signed or encrypted. A signed icon (a checkmark) appears in the header area of a signed message. To view the certificate details, click the icon. If the message was altered after it was signed, Mail displays a warning that it can’t verify the message signature. Trying to download with the button for PGP Desktop Email for Mac downloads the Linux version, but using the Linux button seems to download the Mac dmg. The version appears to be 10.1.2, but from what I read, it doesn't work on Lion. So it looks like Symantec will nail the PGP coffin shut. It was killed by greedy, short sighted MBAs at PGP that.

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Email encryption


Although OpenPGP’s main purpose is end-to-end encrypted email communication, it is also utilized for encrypted messaging and other use cases such as password managers.

For all operating systems

OpenPGP is available for all major platforms, such as Windows, Mac OS, GNU/Linux, Android, and iOS.

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Standing the test of time

OpenPGP was standardized in 1997 and since then continuously improved. As far as we know, intelligence organizations aren’t able to break it.

All email applications on this page support the OpenPGP standard either directly or with additional software.The authors of this webpage are not actively participating in the development of each of these third-party apps.No security audits have been done by us and, thus, we cannot provide any security guarantees.

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  • Outlook:
  • Postbox using Enigmail
  • Thunderbird:

Mac OS

  • Postbox using Enigmail
  • Thunderbird:




  • Thunderbird:

Browser Plugins

Webmail Provider with Browser Plugins

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A lot of webmail providers support email encryption via the OpenPGP standard using Mailvelope.The Mailvelope website provides a list of supported webmail providers.

Providers with help pages:

Pre-configured (authorized) providers:

Other authorized providers with API support:

Webmail Provider with In-Browser Cryptography

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In contrast to the previous section, the following webmail providers do not require the installation of additional browser plugins, instead OpenPGP is implemented in JavaScript provided directly by the website.While these are easier to set up and provide basic security guarantees with OpenPGP, some people don’t consider these “end-to-end secure”.

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  • Hushmail (limited OpenPGP support)

Project Missing?

If a project is missing and you would like it included, please open a pull request at note that we only include published, working software, which implements the standard.The software is ordered alphabetically within the sections.