查看文章

Distance-bounding protocols have been proposed as a means of detecting relay attacks, also known as mafia fraud. In this paper we present the first symmetric key based distance-bounding protocol that is also resistant to so-called terrorist fraud, a variant of mafia fraud. Distance-bounding protocols require a communication channel that can exchange single bits with extremely low latency. This unconventional communication requirement has prompted Hancke and Kuhn to assert in a recent publication that ultra wide band (UWB) radio is necessary to achieve a useful distance-bounding resolution for RF security devices (contactless smart cards, RFID tags and the like). We analyse this assertion and present an alternative, novel communication approach that leverages the phenomena of side channel leakage to deliver a low latency channel. Our proposal is capable of detecting sophisticated relay attacks without …