You don't need one central register with intimate data of citizens. You can keep registers local to avoid widespread data breaches. It's still possible to verif

You don't need one central register with intimate data of citizens. You can keep registers local to avoid widespread data breaches. It's still possible to verify the authenticity (e.g. for police) by requesting from the local register (electronically) but no one has access to all data at once. At the same time, the system can be designed to only store the data necessary. Don't think it's necessary to store more information than for SSID.