Seahorse is a Gnome front-end for managing encryption keys and integrates with nautilus, gedit and other applications for encryption purpose. Some of the features of Seahorse:

Backup your keys and keyring
Cache your password
Create and manage SSH keys
Crate and manage PGP keys
Publish and retrieve keys

Seahorse in Action:

An 18 year old Hacker from New Zealand with the alias “AKILL” have been arrested and put into custody by the police with the help of FBI, last night. He was accused of running a botnet of 1.5 million computers. the bot net was used to steal credit cards, manipulate stock trades and perform [...]