The researches of mobile RFID (Radio-Frequency IDentification) applications in recent years have increased noticeably. They combine the technology of RFID and mobile device to create a new convenient application area for people. But they also suffer from the security issues because the insecure communication channel among tags, readers and databases. In 2012, Zhou et al. proposed a mutual authentication protocol using ECC (Elliptic Curve Cryptography) for mobile RFID applications. However in their protocol, we found that once the reader successfully read the data of a certain tag from the server, then the reader can read it unlimited times without reading that tag again. Therefore, their protocol cannot support some mobile RFID applications such as the security patrolling application. In this paper, we propose a new mobile RFID mutual authentication protocol that is suitable for security patrolling application.
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