The grandparent post was asking about the German payment system, which presumably refers to SEPA Direct Debit, not debit cards.
What you are referring to is called 3DS, and it's a feature of both credit and debit cards. (It's available worldwide, but most commonly used in the EU, since it's mandated for ecommerce card transactions in many circumstances.)
What you are referring to is called 3DS, and it's a feature of both credit and debit cards. (It's available worldwide, but most commonly used in the EU, since it's mandated for ecommerce card transactions in many circumstances.)