After many requests from several users and after many months of promise, the Dotdeb repositories are GPG-signed. Yes, you can now get rid of the annoying “WARNING: The following packages cannot be authenticated!” message!

Waiting for a dotdeb-keyring package, you just have to get the appropriate file by hand and add it to your trusted keys’ keyring :

wget -O- http://packages.dotdeb.org/dotdeb.gpg | sudo apt-key add -
I hope you’ll enjoy it.