LRMAPC: A Lightweight RFID Mutual Authentication Protocol with Cache in the Reader for IoT

As one of the core techniques in the Internet of Things (IoT), Radio Frequency Identification (RFID) plays a crucial role in IoT development. Although the low-cost RFID system has wide prospect, it has to face with huge challenges because of potential security risks, privacy problems and efficiency due to its limitations of processing capability, and storage space and power supply in RFID tags. The lightweight RFID mutual authentication protocol is one of the possible solutions in secure authentication of the low-cost RFID system. In this paper, we propose a lightweight RFID mutual authentication protocol with cache in the reader, named LRMAPC, to store the recent visited key of tags in LRMAPC, so that recent visited tags can be authenticated directly in the reader. The LRMAPC can greatly reduce the computational and transmission cost. Especially, it can reduce computational costs greatly when a large number of tags want to be authenticated. We prove the correctness of LRMAPC using GNY Logic. Compared with other existing works, LRMAPC achieves stronger security and higher efficiency.