In the near future, Radio Frequency IDentification (RFID) technology is expected to play an important role for object identification as a ubiquitous infrastructure. However, low-cost RFID tags are highly resource-constrained and cannot support its long-term security, so they have potential risks and may violate privacy for their bearers. To remove security vulnerabilities, this paper proposes a robust mutual authentication protocol between a tag and a back-end server for low-cost RFID system that guarantees data privacy and location privacy of tag bearers.
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