TDOA-enhanced Distance Bounding in the Presence of Noise

In this paper, a new method to secure non-ideal distance bounding techniques using time difference of arrival measurements is presented. Accurate and secure localization is crucial for many applications of real life wireless sensor networks, and extensive research has been dedicated to this topic in recent years. Distance bounding protocols are employed such that a verifier node can authenticate a prover node and at the same time ensure that the prover is close enough to the verifier. In order to increase the robustness of existing distance bounding protocols to attacks such as "early detect" or "late commit", the use of passively listening verifiers that are employed additionally to the distance bounding primary verifier is studied. In such a way an extended set of measurements is obtained. The proposed approach is able to prevent those attacks. We study the presence of some vulnerabilities in our method and we show a way to prevent them.