Provided are an authentication processing method and device, a storage medium, and an electronic device. The method includes that: a terminal receives an authentication request message from an authentication function; and in cases where authentication on the authentication request message fails, the terminal feeds back an authentication failure message to the authentication function. In cases where the cause of the authentication failure is a Message Authentication Code (MAC) failure and in cases where a cause of authentication failure is a Synchronization (Sync) failure, the terminal feeds back authentication failure messages of the same type to the authentication function.