A Radio Frequency Identification Device (RFID) allows effective identification of a large number of tagged objects without physical or visual contact. RFID systems are a promising technology for supply chain management and inventory control. As individual item tagging becomes a reality, privacy concerns over RFID use come to the fore. The shared radio medium allow eavesdropping and unauthorized tag reading which poses threats to individual's privacy. Moreover, due to the mode of use of RFIDs, new threats emerge. This paper proposes an efficient RFID tag identification algorithm that incorporates reader-authentication. This algorithm is secure against the anticipated threats to RFID systems.
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