Card skimmers are so successful is because they’re nearly impossible to catch. They’re cheap and easy to make and just slide onto anything you might use to swipe a card, stealing your information in the process. They’re also part of the reason you have to use that annoying chip card that takes forever to process.
But check out this skimmer found by security researcher Ben Tedesco in Vienna. It’s totally unrecognisable. It literally took a professional to find it.
So always be on the lookout for anything suspicious if you ever have to swipe your card.