Grouping-Proof Protocol for RFID Tags: Security Definition and Scalable Construction

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Executive Summary

In this paper, the authors propose a grouping-proof protocol for RFID tags based on secret sharing. The proposed protocol addresses the scalability issue of the previous protocols by removing the need for an RFID reader to relay messages from one tag to another tag. The authors also present a security model for a secure grouping-proof protocol which properly addresses the so called mafia fraud attack. Mafia fraud attack (Sometimes called distance fraud) is a simple relay attack suggested by Yvo Desmedt. Any location-based protocol including RFID protocols is vulnerable to this attack even if cryptography is used.

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