A Random ID Update Scheme to Protect Location Privacy in RFID-Based Student Administration Systems

Recently the RFID has been received great attentions and gotten wide applications in many different areas including some administration systems for automatically managing students in a campus. However, a RFID tag may infringe on its owner´s location privacy because of its traceability. Therefore, location privacy problems in RFID-based student administration systems become a critical issue in applying such systems to the practical. Three representative schemes to solve these problems are explained and analyzed. Moreover, a safe, fast and low cost scheme which offers better privacy protections is proposed. In this scheme, a hash value is generated from a secret ID and a random number in a RFID tag by using a cheap hash circuit, and it is used for an identifier of a user. The secret ID is updated by using the hash circuit when a reader for updating is used. Finally, some comparisons between the proposed scheme and the other three typical schemes are presented in terms of safety, speed and cost