The security on a card is really via policy, not via technical security. It doesn't matter how secure your encryption is if you are susceptible to a wrench atta

The security on a card is really via policy, not via technical security. It doesn't matter how secure your encryption is if you are susceptible to a wrench attack [0]. As long as the bank accepts liability for NFC payments while vehemently denying any liability if you share your pin, it doesn't really matter how technically good their security is. [0] https://xkcd.com/538/ https://xkcd.com/538/