Here are some quick reminders on extracting fingerprints from various
encryption keys.

With [[GNU Privacy Guard|gpg]] ([[OpenPGP|PGP]] keys):

    $ gpg --fingerprint
    /path/to/pubring.gpg
    ------------------------------
    pub   1024D/12345678 2008-08-09 [expires: 2011-08-08]
          Key fingerprint = 1234 5678 90AB CDEF 1234  5678 90AB CDEF 1234 5678
    uid                  John Doe <nowhere@invalid.com>
    
    ... (other accounts in your keyring) ...

With OpenSSH ([[SSH]] keys):

    $ ssh-keygen -lf some-key.pub
    2048 12:34:56:78:90:ab:cd:ef:12:34:56:78:90:ab:12:34 some-key.pub (RSA)

With OpenSSL ([[SSL]] keys):

    $ openssl x509 -noout -in cert.pem -fingerprint
    SHA1 Fingerprint=12:34:56:78:90:AB:CD:EF:12:34:56:78:90:AB:CD:EF:12:34:56:78