A new two-message authentication protocol for RFID sensor networks

Radio Frequency Identification (RFID) technology is a method to remotely store and retrieve data using a small microchip called the RFID tag. This makes identification, authentication of objects and people possible without any physical contact between a tag and its reader. First developed in 1940 by the British army, RFID have developed considerably thanks to the fast development of radio techniques during the past few years. As of today, RFID have been applied to a wide range of problems: supply chain management to replace barcode, access control in restricted areas such as laboratories and airports, asset tracking and locating medical staff or certain patients to ensure an efficient response in medical emergencies. As a result, billions of tags will be deployed within the next years. However, RFID development is threatened by privacy and security risks. The limited capabilities of RFID tags make privacy and security enforcement a special challenge. This article presents a new method to ensure a mutual authentication between tags and readers using only two messages and without the use of complex cryptography.