Mobile information terminal and control method thereof

1. A control method for a mobile information terminal, comprising:

receiving, using a touch screen, a first operation for restricting second operations for applications of the mobile information terminal; and

upon receiving the first operation, registering, using a controller, an application executed in a foreground mode as a designated application and starting a restricting process, without entering a lock mode in which the first operation is not received by the touch screen,

wherein the restricting process includes:

upon receiving one of the second operations by the touch screen, determining, using the controller, whether or not the one of the second operations is for the designated application;

when the one of the second operations is for the designated application, executing a process based on the one of the second operations;

when the one of the second operations is not for the designated application, authenticating, using the controller, whether or not a user currently operating the mobile information terminal is an authorized user of the mobile information terminal;

when the user is authenticated as the authorized user, executing the process based on the one of the second operations; and

when the user is not authenticated as the authorized user, restricting, using the controller, execution of the process based on the one of the second operations.

2. The control method for the mobile information terminal according to claim 1 , further comprising:

when the user is not authenticated as the authorized user, displaying a screen on the touch screen for receiving non-designated application permission information; and

upon receiving the non-designated application permission information by the touch screen, executing the process based on the one of the second operations.

3. The control method for the mobile information terminal according to claim 1 , further comprising:

when the one of the second operations is for the designated application, determining whether or not the one of the second operations is a pre-permitted operation, and

when the one of the second operations is the pre-permitted operation, executing the process based on the one of the second operations.

4. The control method for the mobile information terminal according to claim 1 , wherein the authenticating includes face recognition.

5. The control method for the mobile information terminal according to claim 1 , wherein the one of the second operations is for launching an application other than the designated application.

6. The control method for the mobile information terminal according to claim 1 , where the restricting process further comprises:

upon receiving a third operation by the touch screen, displaying a screen for receiving PIN on the touch screen; and

upon receiving the PIN by the touch screen, terminating the restricting process.

7. A mobile information terminal comprising:

a touch screen which receives a first operation for restricting second operations for application of the mobile information terminal;

a controller configured to:

register an application executed in foreground mode as a designated application upon receiving the first operation; and

start a restricting process without entering a lock mode in which the first operation is not received by the touch screen,

wherein, while in the restricting process, the controller further configured to:

upon receiving the one of the second operations by the touch screen, determine whether or not the second operation is for the designated application;

when the one of the second operations is for the designated application, execute a process based on the second operation;

when the one of the second operations is not for the designated application, authenticate whether or not a user currently operating the mobile information terminal is an authorized user of the mobile information terminal;

when the user is authenticated as the authorized user, execute the process based on the one of the second operations; and

when the user is not authenticated as the authorized user, restrict execution of the process based on the one of the second operations.

8. The mobile information terminal according to claim 7 , wherein, the controller is further configured to:

when the user is not authenticated as the authorized user, display a screen on the touch screen for receiving non-designated application permission information; and

upon receiving the non-designated application permission information by the touch screen, execute the process based on the one of the second operations.

9. The mobile information terminal according to claim 7 , wherein the controller is further configured to:

when the one of the second operations is for the designated application, further determine whether or not the one of the second operations is a pre-permitted operation, and

when the one of the second operations is the pre-permitted operation, execute the process based on the one of the second operations.

10. The mobile information terminal according to claim 7 , wherein the user authentication unit authenticates using face recognition.

11. The mobile information terminal according to claim 7 , wherein the one of the second operations is for launching an application other than the designated application.

12. The mobile information terminal according to claim 7 , wherein the restricting process further comprises:

upon receiving a third operation by the touch screen, display a screen for receiving PIN on the touch screen; and

upon receiving the PIN by the touch screen, terminate the restricting process.