Is it possible to encrypt file with .asc extension directly from Nautilus?
I tried with Seahorse add on but its always encrypting with gpg extension.
You can use Nautilus-Actions Configuration Tool and create an action to do this.
Find the application in Software Centre
From Gnome Terminal type:
sudo apt-get install nautilus-actions
nautilus -q
nautilus-actions-config-tool
Then add you action like this:
path = /usr/bin/pgp
parameter = --recipient "" --armor --encrypt %f
Now when you right click on file, you'll see this
Actual Result (even if not GUI, because I don't have nautilus-actions-config-tool installed) :
