Adaptive Wireless Channel Probing for Shared Key Generation
Generating a shared secret key between two parties from the wireless channel is of increasing interest. The procedure for obtaining information from wireless channel is called channel probing. Previous works used a constant channel probing rate to generate a key, but they neither consider the tradeoff between the Key Generation Rate (KGR) and channel resource consumption, nor adjust the probing rate according to different scenarios. In order to satisfy users' requirement for KGR and to use the wireless channel efficiently, the authors first build a mathematical model of channel probing and derive the relationship between KGR and probing rate.