Abstract
AbstractRFID systems are vulnerable to different attacks related to the location; distance fraud attack, relay attack and terrorist attack. The main countermeasure against these attacks is the use of protocols capable of measuring the round trip time of single challenge‐response bit. In this paper, we consider a modification of these protocols applying a new feature; the ‘void challenges’. This way, the success probability for an adversary to access to the system decreases. We use as reference‐point the most popular of this kind of protocols, the Hancke and Kuhn's protocol, to show the improvements achieved when different cases are analysed. Copyright © 2008 John Wiley & Sons, Ltd.
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