I want to make an app that reads QR code from places that I and only I have generated the code for.
For example, I make a QR code and stick it to the wall and I read it normally, if other people have access to the QR code it should work (because it’s my paper). But if someone takes the paper, puts it into the scanner (or used their phone) and reprints it, I don’t want them being able to read it (because it’s not my print)
Is there a way to stop the QR code from being reprinted? Like putting some code to it or using some kind of paper that loses its data when copied..