Comment 9 for bug 268946

Here's what needs to be done:

An icon for application/pgp-encrypted mimetype needs to be created. None of the icons found in /usr/share/pixmaps/seahorse/ are suitable, as none of them represent an encrypted file. This icon should follow Tango icon theme guidelines. It should be installed under /usr/share/icons/hicolor/ and shipped with seahorse's package.

The same icon needs to be created but following Humanity's style. It should be installed under /usr/share/icons/Humanity and /usr/share/icons/Humanity-Dark and shipped with humanity-icon-theme's package.