Authentication of a user of a software application

1. A method for authenticating a user, comprising:

transmitting a network authentication of the user provided by an authentication medium from a mobile terminal belonging to the user to a back-end server of a wireless network;

connecting the mobile terminal to the wireless network;

starting a software application to carry out the authentication with respect to an application server accessible via the wireless network, on the mobile terminal;

transmitting an authentication request from the application server to the software application after starting the software application and forwarding the authentication request from the software application to the back-end server;

transmitting the authentication request from the back-end server to the software application and transmitting the network authentication of the user from the software application to the back-end server; and

transmitting an application authentication of the user from the back-end server of the wireless network to the application server, wherein the application authentication comprises access data that is selected by the user while avoiding name conflicts, assigned to the software application, and stored on the back-end server.

2. The method of claim 1 , wherein the authentication medium comprises a subscriber identity module (SIM) card of the wireless network inserted into the mobile terminal and assigned to a communication module of the mobile terminal, or a hardware security module of the wireless network associated with the communication module of the mobile terminal.

3. The method of claim 1 , wherein the software application queries the network authentication of the user from the authentication medium and the authentication medium supplies the network authentication of the user.

4. The method of claim 1 , wherein the back-end server manages the application authentication of the user assigned to the software application in a credential management system and is authorized at least one-time by the user to transmit the application authentication to the application server.

5. A system for authenticating a user, comprising:

a wireless network;

at least one application server which conducts authentication and is accessible via the wireless network;

a back-end server of the wireless network;

at least one mobile terminal having a communication module connected to the wireless network, the at least one mobile terminal comprising:

at least one software application to conduct the authentication with respect to the at least one application server, and

an authentication medium providing network authentication for a user; and

an application authentication of the user comprising access data freely selected by the user while avoiding name conflicts, wherein the access data is assigned to the at least one software application, stored on the back-end server and used when authenticating the user.

6. The system of claim 5 , wherein the authentication medium is assigned to the communication module and comprises a subscriber identity module (SIM) card of the wireless network inserted into the mobile terminal or a hardware security module of the wireless network connected to the mobile terminal.

7. The system of claim 5 , wherein the back-end server comprises a credential management system that stores the application authentication.