ROAD: An RFID Offline Authentication, Privacy Preserving Protocol with Dos Resilience

As RFID applications become widespread, different authentication schemes have been proposed to address the security and privacy issues in RFID systems. Most recent protocols have employed a "central server" model. This kind of authentication is vulnerable to Dos attack. In this paper, we present an RFID offline authentication protocol with Dos resilience, ROAD, which provides a more flexible and privacy preserving authentication without the need of a central server. Moreover, we suggest another offline scheme, ROAD⁺ for a targeted tag authentication with high search efficiency. We also show that ROAD⁺ provides a technical support for an absolutely new application of RFID systems.