| 摘要 |
<p>Disclosed are a dynamic password authentication method and system. The method includes: a server receiving first information sent by a client generating second information according to same, setting each transmission bit in the second information as a corresponding lightness state or colour state to obtain third information, and sending the third information to the client; the client converting the third information into a pulse optical signal for output; when receiving the pulse optical signal, a dynamic password device converting same into intermediate information, extracting a part of or all of the intermediate information and converting same into display information to be viewed by a user; the dynamic password device receiving trigger information, and generating a first dynamic password according to the intermediate information; the client receiving the first dynamic password input by the user and sending same to the server; and the server generating one or a group of second dynamic passwords, and verifying whether the first dynamic password is legitimate according to the one or a group of second dynamic passwords. The present invention improves authentication security.</p> |
