| 摘要 |
PROBLEM TO BE SOLVED: To provide a system constituted so that a normal transmitter/receiver individually creates a secret key in secret based on irregular fluctuation of radiowave propagation path characteristics of radio communication and the radio communication with high security is performed by using the created secret key. SOLUTION: In the case of performing the radio communication by using the secret key, a signal for measurement is first transmitted from the respective radio stations 1, 2 to the other radio stations 2, 1, the signal for measurement which is transmitted from the other party and changed by the radio wave propagation path characteristics between the radio stations is received and time series of a delay profile is measured. Then, the secret keys are uniquely crated in the respective radio stations 1, 2 based on the delay profile and the communication is performed by using the shared secret keys. COPYRIGHT: (C)2004,JPO&NCIPI
|
