Arch Linux and keys update Linux 02.02.2016

Today I tried to update my arch box and got the following error

error: confuse: signature from "Thorsten Töpper <atsutane@freethoughts.de>" is unknown trust

I have fixed it with following command

sudo pacman-key --refresh-keys

If you want to add specified key use following command

gpg --keyserver hkp://keys.gnupg.net:80 --recv-keys C1A60EACE707FDA5