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RFID tags are small, cost-effective microchips that emit ID information in response to reader queries, often used for inventory management and theft detection. However, their operation poses significant privacy concerns, such as ID leakage and location tracing, allowing adversaries to eavesdrop on sensitive information. Our research focuses on enhancing RFID security through methods like re-encryption schemes to protect ID information, secure yoking proofs to prevent unwanted access, and key change protocols for owner modifications. Our goal is to safeguard personal privacy while utilizing RFID technology effectively.
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Security problems on RFID tags(short introduction) Sakurai Lab., Kyushu Univ. Junichiro SAITO saito@itslab.csce.kyushu-u.ac.jp
What is a Radio Frequency Identification（RFID） tag? • A small and inexpensive microchip that emits an ID in response to query from a reader • Used as a substitute for a bar code • management of goods and its circulation, theft detection • Little computational power • Easily readable by a reader • Be monitored communication between a RFID tag and a reader →Infringement of privacy
Privacy problems • ID leakage • An adversary can eavesdrop ID information • She can read by using a reader • leakage of information about belongings • ID tracing • If ID information on an RFID tag is fixed, an adversary can trace tag owner's activity • Infringement on location privacy price of the suit ○○ yen in wallet shoe size
Our research themes • Location privacy • We can use re-encryption scheme to change ID information • Yoking proof and grouping proof • We showed a replay attack against Juels's yoking proof • Owner changing • After changing owner, new owner doesn't want that old owner can read the RFID tag We proposed Re-encryption scheme with a check We proposed secure yoking proof by using a time stamp We proposed a key change scheme for changing owner
