This blog has featured several stories about payment card skimming devices designed to be placed over top of credit card terminals in self-checkout lanes at grocery stores and other retailers. Many readers have asked for more details about the electronics that power these so-called “overlay” skimmers. Here’s a look at one overlay skimmer equipped with Bluetooth technology that allows thieves to snarf swiped card data and PINs wirelessly using nothing more than a mobile phone.
A KrebsOnSecurity story last month about credit card skimmers found in self-checkout lanes at some Walmart locations got picked up by quite a few publications. Since then I’ve heard from several readers who work at retailers that use hundreds of thousands of these Ingenico credit card terminals across their stores, and all wanted to know the same thing: How could they tell if their self-checkout lanes were compromised? This post provides a few pointers.
Recent local news stories about credit card skimmers found in self-checkout lanes at some Walmart locations reminds me of a criminal sales pitch I saw recently for overlay skimmers made specifically for the very same card terminals.