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A comment on Ask HN: Why are credit card chip readers so slow?. Parent comment

Re:Ask HN: Why are credit card chip readers so slow? by StavrosK on Monday June 26, 2017 @12:39PM (#14638098)
You don't. The card has a CPU on it that's the only thing that has access to the key and just refuses to authenticate any more after a few attempts.

At least that's how I'd do it.

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