Last week, I tried to register for a service and was really surprised by a password limit of 16 characters. Why on earth yould you impose such strict limits? Never heard of correct horse battery staple?

      • SkunkWorkz@lemmy.world
        1·
        2 years ago

        Modern cards have a chip inside them that’s basically a very tiny computer. It can check how many times the pin was incorrect.

          • SkunkWorkz@lemmy.world
            1·
            2 years ago

            Even if you could you can’t recover the PIN from it. Since it’s not stored on the card, the chip checks the entered PIN against a secret key with cryptographic calculations if it is correct. But you can’t get the PIN from that secret key. Also if I remember correctly the chip will self destruct, as in wipes it’s data, when it detects that it’s being tampered with.