>If you can compromise the device and extract the signal sent from the sensor, you should have a near universal replay payload. Right now that is still an espio

>If you can compromise the device and extract the signal sent from the sensor, you should have a near universal replay payload. Right now that is still an espionage realm threat, but as these methods become more universal, mass attacks against large populations become more and more appealing. If the manufacturers had a sense of security, they would make the sensor into a hard-wired device that takes an auxiliary value as input and combines the input with a fuzzy extractor to provide a unique key per auxiliary value in such a way that neither the value nor the biometric can be extracted from the key. But I'm not holding my breath!