Identity authentication method and system by utilizing acoustic communication

The invention provides an identity authentication method by utilizing acoustic communication. The method can be applied to identity authentication control scenarios. The method comprises the steps: (1), a system is initialized, and authentication double parties pre-appoint algorithm seed parameters; (2), an authenticated party sends audio signals including probe information to activate an authentication device; (3), the authentication device plays the audio signal including an unique identification number of the device; (4), the authenticated party generates a disposable key through an authentication algorithm; (5), the authenticated party encodes the disposable key through a real-time audio stream and plays the disposable key; (6), an authentication party receives the real-time audio information and performs decoding and authentication; (7), the authentication party processes an authentication result, encodes the authentication result by utilizing real-time audio, and transmits the authentication result to the authenticated party; and (8), the authenticated party receives the authentication result audio stream played in step (7), and decodes and displays the authentication result. The invention provides a low-cost and high-safety authentication method and system based on the acoustic communication.