Identity authentication method, device and system

The invention discloses an identity authentication method, a device and a system, and belongs to the field of information safety technology. The method includes the steps of binding the personal identity authentication information; generating a first dynamic password based on a first authentication factor and a first secret key, and converting the personal identity authentication information and the first dynamic password into an authentication figure; extracting the personal identity authentication information and the first dynamic password from the authentication figure, and verifying the first dynamic password; determining whether or not the personal identity authentication information passes the authentication based on a verified result. The device includes a storage module, a generating module, and a conversion module. The system includes a safety chip, a terminal device, an identification terminal, an authentication server, and a database server. The invention adopts a memory and a processor in the safety chip to carry out the coding of the authentication figure, thus avoiding the attack of virus on a device and other malicious attacks. At the same time, the authentication figure becomes time-effective by being added with the dynamic password, thus effectively preventing the embezzlement of the authentication figure.