signify(1) on OpenBSD
The text 4e4951c15deb, as OpenBSD 5.5 shipped it.
cryptographically sign and verify files
Flags it lists
-
-C -
-G -
-I -
-S -
-V -
-c -
-e -
-m -
-n -
-p -
-q -
-s -
-x