Free PGP encryption for email using outlook or thunderbird

I am looking for a free PGP encryption for Microsoft outlook or Thunderbird.
toffee_natividadAsked:
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Dave HoweSoftware and Hardware EngineerCommented:
ok, both of those are available for free, using the openpgp package "gpg4win"

first, install http://www.gpg4win.org/ - that will give you outlook integration and your "base" encryption tools (including the winpt tray utility and windows/explorer integration)

second, install http://enigmail.mozdev.org/home/index.php which will extend support for gpg4win onto the thunderbird platform. they will have their engine and keystore in common, so the same key(s) will automatically be available for both applications.
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toffee_natividadAuthor Commented:
thanks Dave Howe, what if I setup this up and it works, let us say people whom have gmail, yahoo mail webmails can read encrypted messages?
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Dave HoweSoftware and Hardware EngineerCommented:
given a bit of work, yes.

if you have firefox, then there is a program "firegpg" which, again works with gpg4win to add pgp support to gmail and indeed to web pages in general.

http://getfiregpg.org/

you can also use the "current page" or "clipboard" functionality of winpt (with any browser, indeed with any package) or if you really want to, just create an account at "hushmail" - which is automatically pgp-enabled.
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toffee_natividadAuthor Commented:
on the receiving end, they need to have the following components:

1) GPG exe.
2) firegpg?
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Dave HoweSoftware and Hardware EngineerCommented:
Yes.

The way gpg (and pgp, and openpgp) works is that the recipient must generate and maintain a secret key, plus a public key. The public key is sent to anyone who needs to send encrypted mail TO them, or verify digitally signed mail FROM them. often this is done by placing it on a keyserver, but you can also send it directly.

for that reason, anyone you want to send a pgp message to must not only have gpg or similar, but must also have already had gpg, used it to generate a key, and gotten that key to you somehow (or you can't send them a message - it isn't possible to send a message to someone that hasn't already sent you their public key)
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toffee_natividadAuthor Commented:
Thanks a lot Dave
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Dave HoweSoftware and Hardware EngineerCommented:
Best of luck - very few people manage to get gpg up and running - the problem is *never* technical, but social - setting up and using crypto is sufficient work that most people stop doing so after a few days, and it is a unusual feat to gather two or three that make it beyond the first month...
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toffee_natividadAuthor Commented:
Thanks Dave.
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Dave HoweSoftware and Hardware EngineerCommented:
This might be a good thing to look at - its a mailing list for people starting out using pgp - you can send test messages and so forth.

http://groups.yahoo.com/group/PGP-Basics/
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