I started this new 2017 year by creating a new PGP key (with fingerprint 3EA1 53E8 9472 8519 CDD1 1B9D 45DD 2720 B15E CA67). My old key was made twelve years ago and was too weak. The new one should be stronger (RSA 4096 bits). You can find my new public key on key servers or on my contact page.

To make it, I followed this "Email Self-Defense" tutorial from FSF (which was a bit out-dated on the version of Enigmail I used). Thanks Gilles! (nearly one year ago: sic!)