system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does it take up to 30 seconds to process and authenticate a credit card transaction using a chip but under a second with the mag swipe?
gpt
It takes just as long with a mag swipe. However with the swipe and the pin the terminal have all the information necessary to conduct the transaction and can do so in the background. However if you use a chip the transaction is conducted by the chip and not the terminal so you have to wait for the transaction to complete before you can remove your card.