Mobility

So Near and Yet so Far: Distance-Bounding Attacks in Wireless Networks

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Executive Summary

Distance-bounding protocols are specialized authentication protocols that determine an upper bound for the physical distance between two communicating parties. They aim to prevent attackers from pretending that the prover is closer to the verifier than is actually the case. Distance-bounding protocols have been suggested for application in access control tokens (e.g., Contact-less smartcards that open doors), to prevent relaying attacks where a local attacker relays a challenge to a distant token that returns a valid response.

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