GPG can't check signature

I was trying to recompile and rebuild libevent2 source from oneiric on my natty server and I had a small error with gpg not being able to check signature

# dpkg-source -x libevent_2.0.12-stable-1.dsc
gpgv: Signature made Fri Jun 17 07:12:50 2011 PDT using DSA key ID 7ADF9466
gpgv: Can't check signature: public key not found
dpkg-source: warning: failed to verify signature on ./libevent_2.0.12-stable-1.dsc

Any idea how to fix this warning?

Solution 1:

I believe the conventional solution is to install the GnuPG keys of Debian Developers package:

sudo apt-get install debian-keyring

Solution 2:

First of all, you should import the key to local keyring as @enzotib instructed:

gpg --keyserver keyserver.ubuntu.com --recv-keys 7ADF9466

Then export the key to your local trustedkeys to make it trusted:

gpg --no-default-keyring -a --export 7ADF9466 | gpg --no-default-keyring --keyring ~/.gnupg/trustedkeys.gpg --import -

Solution 3:

You should import the key to local keyring with the following command:

gpg --keyserver keyserver.ubuntu.com --recv-keys 7ADF9466

Then, try again the command.