Towards More Security Distance Bounding Protocol to prevent relay attacks

Many distance bounding protocols have been proposed recently, with encouraging results. However, there is no distance bounding protocol without final signature that provides success probability of attacker smaller than (3/4)(n) in the presence of all frauds. In this paper, we propose a novel distance bounding protocol without a confirmation message based on two bits mixed challenges. It is prove that our protocol provides a reduced false acceptance rate under all those frauds, remarkably the terrorist fraud.