How much of a security vulnerability is created by NFC (Near Field Communications)? Five Things You Need to Know About Near-Field Communications. How to Automate Your Phone for Every Room in the House with NFC Tags. Near Field Communication. Near Field Communication (NFC) is a set of short-range wireless technologies, typically requiring a distance of 4cm or less to initiate a connection.
NFC allows you to share small payloads of data between an NFC tag and an Android-powered device, or between two Android-powered devices. Tags can range in complexity. Simple tags offer just read and write semantics, sometimes with one-time-programmable areas to make the card read-only. More complex tags offer math operations, and have cryptographic hardware to authenticate access to a sector. Security Concerns with NFC Technology - NearFieldCommunication.org.