On the wiretap channel induced by noisy tags

Abstract

At CARDIS'06, Castelluccia and Avoine introduce noisy tags to allow key exchange between an RFID tag and a reader. We here show that their protocol leads to a well-known information problem: the wiretap channel. We then make use of works by Thangaraj et al. on the case where the main channel is noiseless and where there are only erasures on the wiretapper's channel to improve previous results on noisy tags. In particular, we show how one can achieve, in a practical manner, perfect secrecy for key exchange in this noisy tags context. © 2006 Springer-Verlag Berlin Heidelberg.