Keybase is for keeping everyone's chats and files safe, from families to communities to companies. MacOS, Windows, Linux, iPhone, and Android. With our signature verification service you can verify any document that has been signed with the trusted PKI digital signature. We will verify the signatories’ authenticity and data integrity to give you complete peace of mind. Anyone can access Secured Signing’s Signature Verification Service.
Protonmail: No signature No key Failing signature verification. GnuPG/Outlook Plugin: unsigned state / broken signature; only some indication that this key is used by this user, no manually signing of the key, you only saw some signed mails of this key; valid signature, still no manual interaction with the key. Used many times, pulled from WKD