| 摘要 |
Disclosed is an authentication method used in the system including a communication network, a mobile communication terminal (MT) and an authentication sub-system. When the subsystem receives an authentication request, it generates a first password information and converts the first password information to a first password motion picture signal. The first password motion picture signal changes its uniform color of a frame according to the first password information. The first password motion picture signal is transmitted to the MT. The MT receives the first password motion picture signal and transmits a second password motion picture signal to the subsystem. The subsystem performs inversion of the received second password motion picture signal to the second password information, and compares this second password information with the first password information. One of the first and second password motion picture signals is transmitted as a light signal.
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