WIRELESS COMMUNICATION SYSTEM, AND WIRELESS DEVICE USED IN THE SYSTEM

摘要

An n-number of electric waves are transmitted and received between wireless devices (10, 30) while the directivity of an array antenna (20) being switched into a plurality of directivities (A1 to An) and while the directivity of an array antenna (40) being switched into a plurality of directivities (B1 to Bn). The wireless device (10) detects an n-number of first electric wave intensities corresponding to the n-number of first electric waves received from the wireless device (30), and generates a secret key (Ks1) composed of a bit string on the basis of the n-number of first electric wave intensities detected. On the other hand, the wireless device (30) detects an n-number of second electric wave intensities corresponding to the n-number of second electric waves received from the wireless device (10), and generates a secret key (Ks2) composed of the same bit string as that of the secret key (Ks1) on the basis of the n-number of second electric wave intensities detected.