Evaluation of eavesdropping performance against secret key agreement technique using a received signal estimation method

Assuming application of the received signal estimation method at an arbitrary remote location, we evaluate eavesdropping performance against the secret key agreement technique based on radio propagation characteristics. In the technique, key agreement is realized utilizing the locality of multipath fading. The locality can be broken by using the received signal estimation method and the possible range of eavesdropping the secret key is extended by the method. In this paper, the performance is quantitatively evaluated by computer simulations.