gnome-gpg | GPG passphrase agent based on GNOME Keyring | Mehr ...
gnome-gpg is a command-line wrapper around GPG which neatly integrates passphrase caching with GNOME's keyring agent and user interface. . Having supplied the passphrase for your key once, it is kept in memory for a finite time to save typing it again. This better protects your keys by making it less inconvenient to use a complex passphrase.