I know that it is still not very easy to use PGP for an average user. However, the situation is improving (there are some easy plugins that can even nicely integrate into your GMail webmail). In addition, the press releases of the last time may have encouraged people to think about their safety a little more.
What is the best way to tell people that I am capable of encrypting emails using the OpenPGP standard?
Possible solutions could be:
Sign each outgoing mail
However, this will always produce a lot of text even for a small message. This would definitely annoy me if I do not know anything about it or if I don't care.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Hi, yes that is okay. -----BEGIN PGP SIGNATURE----- [ a lot of stuff ] -----END PGP SIGNATURE-----
Include a text in the signature of the mail
One could write something like:
Please note that unencrypted emails can be easily intercepted and read by third parties. For transmitting confidential information please consider encrypting your emails. My PGP key fingerprint is XX XX XX XX XX XX XX.
Are there any suggestions on how to write that more precisely while keeping it short and sweet?
Asking them directly to encrypt their mails
What are the pros/cons of each solution and how can you show people that may it takes less than five minutes to install an appropriate browser plugin and to generate a key pair with it? Should I offer them that I may possibly assist?