We have a physical insecurity problem in our neighborhood: some strange people in black masks use to enter our yards and damage or steal property. They are mainly using RFID tag copies of unknown source, but most likely neighborhood communal operators provide this, though they deny.
We have access to master key of NFC lock and our keys. I know that there are some security options for RFID: public-private keypairs, unique hardware ID, etc.
Question is, can anything be written to EEPROM of tags which would make any copy, made 'elsewhere' (not from our, potentially different hardware/software we will have to assemble), e.g. from a regular 'make a-key-shop' found in every supermarket, invalid?
Perhaps anything can be done on security key side here?
