WIRELESS COMMUNICATION SYSTEM AND PROGRAM BEING RUN ON COMPUTER

摘要

PROBLEM TO BE SOLVED: To provide a wireless communication system capable of suppressing tapping of a private key. SOLUTION: A wireless device 30 transmits/receives a predetermined radio wave to/from a wireless device 10 while switching the directivity of an array antenna 20 among a plurality of types. The wireless devices 10 and 30 detect the strength of a plurality of radio waves when the directivity of the array antenna 20 is switched among a plurality of types, and form private keys Ks1 and Ks2, respectively, based on the plurality of strengths thus detected. In this regard, the wireless device 30 switches the directivity of the array antenna 20 among a plurality of types such that private keys Ks1 and Ks2 different from a private key Ks3 formed in a tapping device 50 are formed. The wireless devices 10 and 30 perform wireless communication mutually by encrypting/decrypting data using the private keys Ks1 and Ks2 thus formed. COPYRIGHT: (C)2005,JPO&NCIPI