How can I disable prompt about trust when encrypting file with gpg in emacs

Question

I want to use emacs to edit files encrypted with gnu privacy guard. Im using the gpg support built into emacs 23 which I think is easy pg assistant. I import keys created at the command line with M-x epa-import-keys. When I save a file with suffix .gpg I first get to choose recipients among the keys installed on my computer. I choose one of them, my own key created by myself. I then get the question: Use untrusted key anyway? (y or n). What does this mean and how can I disable it? gpg works fine from the command line.

Versions: gpg (GnuPG) 1.4.9, emacs 23.3.

Answer 1

Works fine now, here's what I did:

1. On the command line: I used gpg --edit-key, and then changed the trust level of my key to the highest level.
2. In Emacs: I changed the epg-gpg-home-directory variable to the .gnupg directory holding my gpg key.

Answer 2

You need to use any of "sign" options with edit-key