AUTHENTICATED KEY EXCHANGE USING DISTANCE BOUNDING PROTOCOL

摘要

The method for communicating between a first device and a second device comprises the steps of the first and second device communicating by exchanging messages that are based on signals that are transmitted through a plurality of communication channels; the first device sending a challenge message to the second device over one communication channel; the second device sending upon reception of the challenge message a response message to the first device through at least two communication channels that have essentially identical signal propagation velocities; the first device measuring the time elapsed between the sending of the challenge message to the reception of the response message; the first device computing its distance to the second device based on this time, knowledge about travelling speed of the challenge and the response message and the processing delay that the second device adds to generate and send the response message; wherein the second device encodes its response message essentially by choosing a subset of the at least two communication channels; generates said response message purely through an analogue signal processing means.