A lightweight mutual authentication protocol for RFID networks 2005 IEEE Authors : Zongwei Luo, Terry Chan, Jenny S. Li Date : 2006/3/21 Presented by Hung Fei Yau Outline Introduction Current solutions approach Security scheme requirement Proposed lightweight mutual authentication protocol Conclusion Introduction Two key elements: (1) RFID tag, or transponder, carries object- identifying data. (2) RFID reader, or transceiver, reads and writes tag data. Privacy issues of a RFID system. Reader security issue. Introduction Tag security issue Current solutions approach Extra device added approach (a) Faraday cage (b) Blocker tag (c) Active jamming Radio frequency modification approach (a) Reader change frequency (b) Tag change frequency Other approach (a) Kill tag (b) Hash lock [Unlocked if y=h(x)] Security scheme requirement The focus puts on the security concern over a RFID system using passive tag. (a) Indistinguishability (b) Forward security RSA? Lightweight challenge- response protocol Proposed lightweight mutual authentication protocol Based on hash function [hash chain technique] Proposed lightweight mutual authentication protocol The basic framework of the proposed lightweight security protocol The proposed security protocol Initialization (1) Each tag comes with an initial secret information S0 & c (transaction counter) (2) Backend included : S0, Wk, The proposed security protocol Procedure step Conclusion The proposed scheme can be easily adapted to the limited resource criteria of a passive tag.