Label your public Gulden address with a short name.
Anytime the address is shown on Dactual.com the name will be shown.
You find more info about signing messages in the console of your desktop wallet. Use the command 'help signmessage' for the explanation.
Dactual is a blockchain explorer and data enrichment platform for Gulden.
Gulden develops a safe and independent payment platform
that is always accessible for everyone, now and in the future.