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As more and more items are tagged with RFID (Radio Frequency Identification) tags, grouping-proof technology is widely utilized to provide a coexistence evidence for a group of related items. Due to the wireless channel used in RFID systems, a security risk exists in the communication between the reader and tags. How to ensure the tag’s information security and to generate reliable grouping-proof becomes a hot research topic. To protect the privacy of tags, the verification of grouping-proof is traditionally executed by the verifier, and the reader is only used to collect the proof data. This approach can cause the reader to submit invalid proof data to the verifier in the event of DoP (Deny of Proof) attack. In this paper, an ECC-based, off-line anonymous grouping-proof protocol (EAGP) is proposed. The protocol authorizes the reader to examine the validity of grouping-proof without knowing the identities of tags. From the security and performance analysis, the EAGP can protect the security and privacy of RFID tags, and defence impersonation and replay attacks. Furthermore, it has the ability to reduce the system overhead caused by the invalid submission of grouping-proofs. As a result, the proposed EAGP equips practical application values.

An Anonymous Offline RFID Grouping-Proof Protocol