Our reliance on ever more sophisticated computer systems for the management of data and information means that the field of security and privacy technology continues to be of crucial importance to us all. This book presents ten peer-reviewed papers from the 2013 workshop Radio Frequency Identification/Internet of Things Security (RFIDsec'13 Asia) held in Guangzhou, China, in November 2013. This is the fifth of a series of workshops organized by the Asian branch of RFIDsec, which provides a platform for researchers, enterprises and governments to investigate, discuss and propose new solutions fo.