itsme® only works when I use my mobile phone, my SIM card and my personal itsme® code (or fingerprint). This unique combination of three necessary elements ensures that only I can use my data. Only you know your code, it is stored nowhere else. You can compare it to the PIN of your bank card.
In addition, mobile interactions with itsme® are not done using the regular Internet but make additional use of the secured SIM card and the network of mobile operators. That’s what makes itsme® so special. And particularly safe.