system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are the chips in debit cards a thing?

I've always heard they're "more secure" and "faster payment", but half the time the chip readers at stores I go to are down or take three times as long as just swiping. And I dont understand how it increases security?
gpt
When you swipe the magnetic stripe on your card, the exact same information is transmitted each time, including a static security code. If someone copies this information, they can just put it on another card and use it. The chip sends most of the same information, but instead of a static security code generates a dynamic security code. A thief can't just easily copy the same information onto a magnetic stripe either because they won't have the static code that goes on the stripe either. Without the right security code, the payment network will reject the transaction.