Researcher spots an ATM Skimmer while on vacation in Vienna

We have heard a lot about ATM skimmers, but it's nearly impossible to spot one. Some skimmers are designed to look exactly like the card slot on the original machine and attached to the front, and others are completely hidden inside the ATM. But, during his vacation in Vienna, Austria, cyber security expert Benjamin Tedesco spotted an ATM skimmer that was totally unrecognizable.