Information Security Asked by J. Tukes on December 19, 2021
I’m making an e-mail system/client. I’m trying to correctly detect incoming e-mails which can be replied to with PGP encryption. This means finding out their public PGP key. I currently do:
I suspect that these could be done:
Thanks in advance for clarifying how one properly detects/sends PGP public keys in e-mail context for maximum support.
There's no one particular way to do this. Just signing all outgoing mail is one way people advertise that they support PGP provided their key is on a public keyserver.
Enigmail (Thunderbird plugin) has an option to include a public key as an attachment in all outgoing mail. It has a type of application/pgp-keys
and the name is 0x<KEYID>.asc
where <KEYID>
is the key ID in hex.
There are several clients which support Autocrypt, a protocol for opportunistic encryption by storing public keys in headers.
Answered by smithkm on December 19, 2021
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