Security authentication method and device, equipment and storage medium

The invention provides a security authentication method and device, equipment and a storage medium, which can be applied to the field of network security or other fields. The method is applied to an authentication device, the authentication device comprises an authentication interface, and the method comprises the steps that a transaction request sent by a client is received through the authentication interface, the transaction request comprises a first scene identifier, and the first scene identifier is used for indicating a transaction scene; determining a first security authentication system corresponding to the first scene identifier; according to the first security authentication system, performing security authentication on the transaction request to obtain a security authentication result; if the security authentication result is that the security authentication is successful, a first response message of successful authentication is sent to the client, and the first response message is used for indicat