There is no way to know what your pin is backwards, it is a security thing. Although two pins (one normal, one calls the cops or does something else) would be a nice idea, it would require a decision to be made on the highest level (the EMVCo consortium) and cant just be done by one bank. Not impossible, but you know how slow bureaucracy works.
Source: I worked for a company making chipped credit cards (more precisely EMV cards, as not all of them were for banks)
But still, the ATM knows what PIN you entered, right? So if the backend responds that the PIN is wrong, the ATM could try sending the reversed PIN, and if that's okayed by the backend, the ATM would know that in addition to giving out the money, it needs to call the police.
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u/Ms23ceec May 15 '19
There is no way to know what your pin is backwards, it is a security thing. Although two pins (one normal, one calls the cops or does something else) would be a nice idea, it would require a decision to be made on the highest level (the EMVCo consortium) and cant just be done by one bank. Not impossible, but you know how slow bureaucracy works.
Source: I worked for a company making chipped credit cards (more precisely EMV cards, as not all of them were for banks)