Add key fingerprint info

1 files changed, 8 insertions, 0 deletions

diff --git a/gpg.md b/gpg.md
index b76bba3..d12c107 100644
--- a/gpg.md
+++ b/gpg.md
@@ -54,6 +54,14 @@ use in mutt:
     # specify the signing key (by default it's your first one)
     gpg --local-user <signing key> --edit-key <key to sign>
 
+## Key Fingerprint/ID
+
+The long hex fingerprint in `gpg --list-keys` is, as could be expected, a
+standardized hash of the key info.
+
+Sometimes a shorter ID is used -- this is actually a suffix of the full
+fingerprint.
+
 ## gpg-agent
 
 `gpg-agent` is a daemon that e.g. provides a passphrase cache for GPG. Running