Where can I get "DA360C64005E0276" public key for "ppa.launchpad.net maverick Release"?
it's easy you have to download the PPA GPG key :
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 005E0276
and then :
sudo aptitude update or sudo apt-get update again.
- How do I fix the GPG error "NO_PUBKEY"?
I wrote a small script a while back that imports all missing GPG keys automatically so if you ever come upon errors like this, check it out: launchpad-getkeys.