Authentication method for invoking open interface and system

The embodiment of the invention discloses an authentication method for invoking an open interface and a system for executing the method. The method comprises the following steps: a service provision platform receives an interface invoking request of an application program transmitted by a server side or a client side, wherein the interface invoking parameters comprise application identification, a private secret key and valid time allocated by the server side for the interface invoking; the private secret key is allocated by the service provision platform when the server side is registered in the service provision platform; the client side logs in the server side, acquires authentication and acquires the interface invoking parameters from the server side; the service provision platform acquires the private secret key corresponding to the application identification from the pre-assigned parameter records, and authenticates the interface invoking request based on the acquired private secret key; if the authenti