Yes, it is useful. I tried to perform the steps suggested by your link but it reply with "no result found". Where does it search for public keys? In all GPG servers? They don't use this product or other.
I try to explain better my question. How can I communicate securely with my friends or other people in the world if they use webmail account (as Gmail, Outlook or other)? If they don't use GPG tools or other? Using Gmail, Outlook from browser you don't distribute you Public Key or not? My question is: How can I find their public keys? Keep in mind that they don't use any email client and no encryption tools. Thank you!
Steve on 10 Jun, 2020 11:30 PM
keys on the key server can only be found if they were uploaded and verified. OpenPGP is agnostic of the operating system or email client being used. In that regard it is universal. But you do indeed need the public key of the recipient to send encrypted emails. So if you are certain that a specific contact does have a public key but you are unable to find the key, you could ask them to upload and verify their key to https://keys.openpgp.org/ or send their public key to you via email.
You can create encrypted messages using only a password in GPG Services. In that case you do not need the public key of the recipient. The recipient then would have to install OpenPGP in order to decrypt that information.