Tag signals for early authentication and Secret Key Generation in wireless public networks

Abstract

In this paper, a new protocol is proposed for securing both authentication and communication in wireless public networks. It relies on the combination of two techniques presented in the article: Tag Signal (TS) and Secret Key Generation (SKG). First, tag signals are used to securely exchange identification information, perform Channel Frequency Response (CFR) and provide a controlled radio advantage to legitimate users. Then secret keys are generated using authenticated CFR to protect communication. In addition to the presentation of the techniques, measured CFR and SKG performance are also provided for real WiFi communications.