Dear Maintainer, When trying to import a certificate into seahorse/gnome-keyring, seahorse GUI application shows the 'import' button grayed out, while mouse hovering the "import" button shows the message "Cannot import because there are no compatible importers". At command line, $ gnome-keyring import XXXXXXXXXXXXX-certificate.p12 Return: gnome-keyring: couldn't parse: XXXXXXXXXXXXX-certificate.p12 gnome-keyring: couldn't find any place to import files It's not possible to digitally sign documents with LibreOffice.