Reflecting on it, it doesn't solve anything, as I still have to give my name and date-of-birth to the person validating it anyway. Otherwise, there is a large

Reflecting on it, it doesn't solve anything, as I still have to give my name and date-of-birth to the person validating it anyway. Otherwise, there is a large degree of normalisation in the id documents in the EU, and you could simply hash each variation.