Secure NFC is the first Android app that can write and verify signed NFC NDEF tags. It works on regular NFC tags!
This app includes the important features of a typical NFC Tag Reader and Writer, plus the ability to create and verify Secure NFC Tags. Signed NFC Tags provide security to NFC-enabled products using provable authenticity to reduce counterfeit and malicious data.
https://play.google.com/store/apps/details?id=com.trustpoint.android.securenfc