| 摘要 |
PROBLEM TO BE SOLVED: To get a parameter, from which authentication data is calculated, through an interception of a radio wave, and to prevent anyone pretending to be authorized from conducting unauthorized communication. SOLUTION: Radio communication equipment comprises an authentication code memory 7, and a data processor 4, where the data processor 4 performs an authentication processing by using an authentication code stored in the authentication code memory 7, if the authentication processing gets through, the data processor 4 calculates a new authentication code and renews the authentication code stored in the authentication code memory. Entered authentication code is checked against a first authentication code. If the both codes do not correspond with each other, the authentication processing is finished. If the both codes correspond with each other, the data processor 4 is activated. |
