| 摘要 |
PROBLEM TO BE SOLVED: To provide a method which enables a transponder to authenticate a terminal before transmitting data to the terminal and enables the terminal to authenticate the transponder before transmitting data to the transponder.SOLUTION: In a method of authentication, by a terminal generating a magnetic field, of a transponder located in this field, the terminal transmits to the transponder first data relative to a current in an oscillating circuit of the terminal, which is measured by the terminal for a first value of a resistive load of the transponder, and the transponder calculates second data relative to the current of the oscillating circuit of the terminal for a second value of the resistive load and transmits the calculated second data to the terminal, and the terminal compares the transmitted second data with third data relative to the current of the oscillating circuit of the terminal, which is measured by the terminal for the second value of the resistive load, and the terminal authenticates the transponder on the basis of the comparison result. |
