Sign my message Things on securiry Public-key protocol is slow Errors I got To list the keys I have in my keyring, use gpg --list-key. Here, I can see one public key in the file pubring.pgp: > gpg --list-key /Users/mvalais/.gnupg/pubring.gpg ------------------------------- pub 4096R/27F4C016 2016-03-04 uid Maël Valais sub 4096R/A3D4828E 2016-03-04 The identifier for my public key is 27F4C016 and the sub identifier A3D4828E. 4096R = 4096-bits RSA encrypted.