This post was originally published on this siteThis blog has featured several stories about “overlay” card and PIN skimmers made to be placed atop Ingenico-brand card readers at store self-checkout lanes. I’m revisiting the topic again because a security technician at a U.S.-based retailer recently shared a few photos of several of these devices pulled from compromised card terminals, and the images and his story offer a fair bit more detail than in previous articles. An “overlay” skimming device (right) that was found attached to a card reader at a retail establishment. The device featured here is a Bluetooth-based skimmer; […]