A RFID yoking proof protocol to preserve an offline verification using the commitment disclosure

A RFID (Radio Frequency Identification) yoking- proof provides a verification manner that a pair of RFID tags is scanned simultaneously by one reader device to guarantee the physical proximity of multiple objects. However, the previous studies provide the verification that requires the online verifier. The connectivity between a reader and a verifier limits the practicality of a yoking proof. In this paper, we propose an offline yoking proof protocol to preserve the offline verification that does not require the online verifier. In addition, the protocol for a pair of tags is easily extended to the one for multiple tags without additional expensive devices. Our analysis shows that the proposed protocol provides offline verification securely and effectively.