This is a good point--my understanding is that it also takes a little longer to run than simple value-store RFID tags do (second(s) instead of milliseconds). Pr

This is a good point--my understanding is that it also takes a little longer to run than simple value-store RFID tags do (second(s) instead of milliseconds). Pressure sensors in tires might be far enough removed from the corresponding reader that encryption is not feasible for the RFID chip.