Whereas building a secure RFID is hundreds or thousands of engineering hours.
Building the insecure RFID is also hundreds or thousands of engineering hours. There is a lot of grunt work that was done regardless; designing the radios, designing the manufacturing process for the ID chips to be as cheap as possible, etc. Getting the crypto right isn't much on top of that.
Building the insecure RFID is also hundreds or thousands of engineering hours. There is a lot of grunt work that was done regardless; designing the radios, designing the manufacturing process for the ID chips to be as cheap as possible, etc. Getting the crypto right isn't much on top of that.