RFID (radio frequency identification) mutual authentication protocol method

Abstract

The invention relates to an RFID (radio frequency identification) mutual authentication protocol method, which comprises the following three stages: a tag identification stage, a mutual authentication stage and an update stage, wherein at the tag identification stage, a reader sends a request to a tag, and the tag returns an identification section (IDS) to the reader after receiving the request; at the mutual authentication stage, after the IDS is identified by the reader, an exclusive-or operation related to a digital synthetic operation is conducted to obtain A and B, A and B are sent to the tag, after the reader is identified by the tag through received A||B, related calculation is conducted to obtain C, C is sent to the reader, and the tag is identified by the reader; and at the update stage, after C is successfully identified by the reader, IDS and secret keys (K1 and K2) in C are updated, then D and E are calculated and sent to the tag, and after E is successfully identified by the tag, IDS and secret keys of E are updated. Only the simple digital synthetic or exclusive-or operation exists in the RFID mutual authentication protocol method. Therefore, the RFID mutual authentication protocol method has the beneficial effects that the calculation amount and storage space of the tag can be effectively reduced, various attacks such as impersonation, retransmission, tracking and denial of service can be resisted, and forward security is provided.

Description

[0001] technical field [0002] The invention relates to the technical field of radio frequency identification and identity authentication, in particular to an RFID two-way authentication protocol method. Background technique [0003] The RFID system is mainly composed of three parts: tags, readers, and back-end databases. In the design of RFID communication protocols, the transmission channel between the back-end database and readers is generally safe, and there is no security risk. They can be regarded as One side of the protocol is collectively referred to as a reader or a reader with a back-end database in this invention; while the wireless transmission channel between the tag and the reader is not safe, there are many potential attacks, and the tag can be regarded as the other party of the protocol . At the same time, since the hardware resources of the RFID system are limited by many factors such as computing power, storage space, and power supply, security, high effi...

AI Technical Summary

Problems solved by technology

However, these protocols still have their own defects, which can be roughly summarized as follows: 1) Authentication and data integrity are not strong

2) It cannot resist attacks such as retransmission and denial of service, and has no forward security

3) Tags require a large storage space

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