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Abstract. Distance-bounding protocols have been proposed by Brands and Chaum in 1993 in order to detect relay attacks, also known as mafia fraud. Although the idea has been introduced fifteen years ago, only recently distance-bounding protocols attracted the attention of the researchers. Several new protocols have been proposed the last five years. In this paper, a new secure distance-bounding protocol is presented. It is self-contained and composable with other protocols for example for authentication or key-negotiation. It allows periodically execution and achieves better use of the communication channels by exchanging authenticated nonces. The proposed protocol becomes suitable for wider class of devices, since the resource requirements to the prover are relaxed.

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