Secure UHF-RFID tag for vehicular traffic management system

UHF-RFID (Ultra High Frequency Radio Frequency Identification), with the feature of reliable, accurate and fast, has been used in the vehicular traffic management system to relief the urban traffic congestion, air pollution etc. To strengthen the system security and improve the performance of the tag, a secure, high performance UHF-RFID tag is designed and implemented in this paper. Authentication and authorization between the reader and the tag are performed to ensure the legal identities of both sides. Identity information of the tag is hidden to prevent unauthorized tracking. Low power circuit technology as well as power management technology is introduced in the encryption operation to increase the sensitivity. The tag chip is implemented with the SMIC 0.18µm CMOS EEPROM technology, conforms to the national standard of GB/T 29768-2013 protocol [1] and achieves mutual authorization, authentication and data encryption. The read and write sensitivity of the tag is measured to be −19dBm and −14dBm respectively.