Abstract: A method for authentication related to a software client application within a client computing device includes: in a first step, an authentication-related command and/or module is invoked by the software client application, and a first group of application protocol data units is exchanged between the client computing device and a subscriber identity module entity; in a second step, a subscriber identity module applet is triggered—via the first group of application protocol data units—to contact a subscriber identity module toolkit and/or to trigger an event, so as to invoke a command of the subscriber identity module toolkit; and in a third step, a second group of application protocol data units are exchanged between the client computing device and the subscriber identity module entity, wherein the subscriber identity module toolkit thereby triggers the client computing device to request a user action from the user of the client computing device.

Abstract: A method for authentication related to a software client application within a client computing device includes: in a first step, an authentication-related command and/or module is invoked by the software client application, and a first group of application protocol data units is exchanged between the client computing device and a subscriber identity module entity; in a second step, a subscriber identity module applet is triggered—via the first group of application protocol data units—to contact a subscriber identity module toolkit and/or to trigger an event, so as to invoke a command of the subscriber identity module toolkit; and in a third step, a second group of application protocol data units are exchanged between the client computing device and the subscriber identity module entity, wherein the subscriber identity module toolkit thereby triggers the client computing device to request a user action from the user of the client computing device.