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Security problems on RFID tags (short introduction)

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

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Security problems on RFID tags (short introduction)

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  1. Security problems on RFID tags(short introduction) Sakurai Lab., Kyushu Univ. Junichiro SAITO saito@itslab.csce.kyushu-u.ac.jp

  2. 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

  3. 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

  4. 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

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