Method and system for double-factor bidirectional authentication

The invention discloses a method for double-factor bidirectional authentication. The method comprises the following steps: releasing a digital certificate and a CA certificate used for signature during the making of the digital certificate by a secret key system; configuring the configuration files of a client and a server-side so as to support the access of the client to an application interface of the server-side; accessing the application interface of the server-side by the client in a double-factor authentication mode; carrying out first verification on a server-side certificate by the client, carrying out second verification on a client certificate by the server-side, and after passing through of both the first verification and the second verification, allowing the client to access the application interface of the server-side. Besides, the invention discloses a system for double-factor bidirectional authentication, corresponding to the method. The method and the system for double-factor bidirectional authentication have the advantages of higher compatibility, wider application range, simpler design, more efficiency in use, and higher safety in data communication.