A Novel Stream Cipher with Hash Function for the RFID Device

In recently years, Radio Frequency Identification (RFID) system in low-cost communication applications is growing rapidly and deploying widely. Regarding the low-cost RFID device, the design of easy and simplified circuits must be concerned first, moreover, integrity and encryption issues also must be considered to avoid an illegal tampering and to secure data between the reader and the tag. In general, the integrity check function provided by the hash function circuit and the encryption function provided by the stream cipher circuit are independent. In this paper, the novel stream cipher circuit with hash function in a RFID device is proposed for integrating integrity and encryption functions, for simplifying the device circuits, and for reducing power consumption. Besides, the FPGA hardware model is used to implement and to validate our proposed scheme. Also, the performance of the proposed hardware circuit is given.