I have Android app for reading NFC tags (NDEF messages). But now, anyone can read this tag, even if it is not my app and my phone. So someone can easy clone my NFC tag and have his own tag. I do not like to use UID that identifies the tag uniquely, because I have to keep data of all tags on phone to check if this is my tag or not.
I am looking for functionality to "encrypt" nfc tag somehow and when swipe tag with proper phone, tag responses, othervise not.