NCR has received reliable reports of NCR and Diebold ATMs being attacked through the use of external skimming devices. These devices are plugged into the ATM network cables and intercept customer card data. Additional devices are attached to the ATM to capture the PIN. A keyboard overlay was used to attack an NCR ATM, a concealed camera was used on the Diebold ATM. PIN data is then likely transmitted wirelessly to the skimming device.