This volume contains the papers presented at the 2012 Workshop on RFIDIoT Security (RFIDsec'12 Asia) held in Taipei, Taiwan on November 8–9, 2012. The workshop was hosted by the Department of Information Management and the Taiwan Information Security Center (TWISC@NTUST) at the National Taiwan University of Science and Technology (NTUST). The General Chairs were Tzong-Chen Wu and Robert H. Deng.

RFIDsec'12 Asia is aligned with the RFID security workshop (RFIDsec) which has been organized as a series of workshops held in Graz (2005/06), Malaga (2007), Budapest (2008), Leuven (2009), Istanbul (2010), Amherst (2011) and Nijmegen (2012). RFIDsec'12 Asia is the fourth edition of the series of workshops to be held in Asia, following RFIDsec'09 Asia in Taipei (2009), RFIDsec'10 Asia in Singapore (2010) and RFIDsec'11 Asia in Wuxi (2011).

RFIDsec'12 Asia aims to provide researchers, enterprises and governments with a platform to investigate, discuss and propose new solutions to security and privacy issues relating to RFID/IoT (Radio Frequency Identification/Internet of Things) technologies and applications. This year, the excellent program consisted of 9 high-quality papers, selected after a rigorous review process by both members of the Program Committee and external reviewers. Many interesting topics are covered, such as entity relationship extraction and the design of secure API on IoT; practical relay attack implementation; path-checking protocol; secure EPCglobal Network Services; and the analysis of mutual authentication on RFID. The formal proceedings for this year, to include these 9 excellent papers, are published by IOS Press as part of the Cryptology and Information Security Series.

RFIDsec'12 Asia was made possible by contributions from many individuals and organizations. First, we would like to thank all the authors who submitted papers. We also gratefully acknowledge the contribution of the Program Committee members and external reviewers for their time and effort on the submission review process. Finally, we thank the sponsors: the Department of Information Management at NTUST and TWISC@NTUST, of RFIDsec'12 Asia for hosting the workshop.

Nai-Wei Lo and Yingjiu Li

November 2012