"Seahorse is a Gnome front end for GnuPG--the Gnu Privacy Guard
program. It is a tool for secure communications and data storage.
Data encryption and digital signature creation can easily be
performed through a GUI and Key Management operations can easily be
carried out through an intuitive interface.
"In addition it includes a Gedit plugin, can handle files using
Nautilus, an applet for managing stuff put in the clipboard and an
agent for storing private passphrases, as well as a GnuPG and
OpenSSH key manager..."