Efficient Probabilistic Communication Protocol for the Private Identification of RFID Tags by Means of Collaborative Readers

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There is a need for efficient communication protocols that allow the private and scalable deployment of RFID systems with a large number of tags. In this paper, the authors leverage the idea of using distributed, collaborative readers to identify RFID tags and propose a new probabilistic communication protocol for those readers to privately identify RFID tags more efficiently in terms of computational cost and bandwidth usage. Their protocol, which is based on hash-locks, allows readers to exchange information so as to reduce the amount of tag IDs stored in their caches.