SASI: A New Ultralightweight RFID Authentication Protocol Providing Strong Authentication and Strong Integrity

TLDR

Low‑cost RFID tags are increasingly common, yet existing ultralightweight authentication schemes are vulnerable, underscoring the need for robust, lightweight protocols. This work proposes a new ultralightweight RFID authentication protocol that delivers strong authentication and integrity protection. The protocol uses only simple bit‑wise operations on the tag, enabling it to resist all known attacks. These properties make the protocol highly attractive for low‑cost RFID deployments.

Abstract

As low-cost RFIDs become more and more popular, it is imperative to design ultralightweight RFID authentication protocols to resist all possible attacks and threats. However, all of the previous ultralightweight authentication schemes are vulnerable to various attacks. In this paper, we propose a new ultralightweight RFID authentication protocol that provides strong authentication and strong integrity protection of its transmission and of updated data. The protocol requires only simple bit-wise operations on the tag and can resist all the possible attacks. These features make it very attractive to low-cost RFIDs and very low-cost RFIDs.