Signature isn't something you are, it's not in any of those three categories, it...

		Dayshine on June 26, 2017 \| parent \| context \| favorite \| on: Ask HN: Why are credit card chip readers so slow? Signature isn't something you are, it's not in any of those three categories, it's closer to your address. Chip + pin = Something you carry (card/chip) + something you know (pin). You need the physical card to use it, card number isn't sufficient.