

Near-field communication (NFC) is a set of protocols that enables two electronic devices to establish communication by bringing them very close together. Usually the devices must be within less than 4cm. Contactless payment systems use NFC devices, including smartphones, and are similar to those used in credit cards and electronic ticket smartcards. Social networking and sharing contacts, photos, videos or files also uses NFC. Many secure environments use NFC technology for authentication, allowing users to log in into computers, printers and for physical access to the building, to name a few examples. But can an attacker use the NFC signal for data exfiltration?