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RFID tag has limited calculation resources and small storage capacity, the wireless communication channel between RFID tag and reader is vulnerable to various malicious attacks. Aimed at these problems, a HMAC-based RFID lightweight authentication protocol is proposed in this paper, and some considerations about protocol implementation are made subsequently. In the new protocol, only the Hash function and XOR operation are used, so that the calculation capacity and storage space of RFID reader are utilized efficiently, the demand for the capacity of calculation and storage of tag are reduced. The protocol framework and the packet format are presented.
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