Mobile information terminal and control method thereof

1. A mobile information terminal having a lock state in which the mobile information terminal requires a user authentication process to transition to an unlock state, the mobile information terminal comprising:

an operating interface, in the unlock state, configured to receive:

a first operation to designate any of applications including a first application and a second application that is different from the first application;

a second operation to impose restrictions on execution of any of the applications; and

a third operation to remove the restrictions on the execution of the any of the applications;

a controller configured to:

perform a first user authentication process to authenticate the user in the lock state;

after the user is authenticated at the first user authentication process,

(1) execute the first application in the unlock state in response to the operating interface receiving the first operation to designate the first application, and

(2) restrict the execution of the second application in the unlock state, in response to the operating interface receiving (i) the first operation not to designate the second application but to designate the first application and (ii) the second operation to impose the restrictions on the execution of the second application;

perform a second user authentication process to authenticate the user without transition to the lock state from the unlock state, in response to the operating interface receiving, in the unlock state, the third operation to remove the restrictions on the execution of the second application; and

after the user is authenticated at the second user authentication process, execute the second application in the unlock state.

2. The mobile information terminal according to claim 1 , wherein the first user authentication process is performed based on PIN authentication, password authentication, pattern authentication, face authentication, iris authentication, fingerprint authentication, or voiceprint authentication.

3. The mobile information terminal according to claim 1 , wherein the controller is further configured to control the first user authentication process by biometric authentication while controlling restriction of execution of the other applications.

4. The mobile information terminal according to claim 3 , wherein the biometric authentication is performed each time the operating interface accepts the first operation and the second operation.

5. The mobile information terminal according to claim 3 , wherein the biometric authentication is always performed while the execution of the other applications is restricted.

6. The mobile information terminal according to claim 3 , wherein the biometric authentication is performed at predetermined time intervals.

7. The mobile information terminal according to claim 1 ,

wherein the operating interface is a touch panel, and

wherein the operating interface is configured to recognize the third operation when the touch panel detects that the user's multiple fingers touch the touch panel simultaneously.

8. A method for controlling a mobile information terminal having a lock state in which the mobile information terminal requires a user authentication process to transition to an unlock state, the method comprising:

in the unlock state, receiving one of:

a first operation to designate any of applications including a first application and a second application that is different from the first application;

a second operation to impose restrictions on execution of any of the applications; and

a third operation to remove the restrictions on the execution of the any of the applications;

performing a first user authentication process for authenticating the user in the lock state;

after the user is authenticated in the first user authentication process,

(1) executing the first application in the unlock state in response to receiving the first operation to designate the first application; and

(2) restricting the execution of the second application in the unlock state, in response to receiving (i) the first operation not to designate the second application but to designate the first application and (ii) the second operation to impose the restrictions on the execution of the second application;

performing a second user authentication process for authenticating the user without transition to the lock state from the unlock state, in response to receiving, in the unlock state, the third operation to remove the restrictions on the execution of the second application; and

after the user is authenticated at the second user authentication process, executing the second application in the unlock state.

9. The method according to claim 8 , wherein the first user authentication process for authenticating the user includes executing PIN authentication, password authentication, pattern authentication, face authentication, iris authentication, fingerprint authentication, or voiceprint authentication.

10. The method according to claim 8 , wherein the first user authentication process for authenticating the user is performed based on biometric authentication while restricting execution of the other applications.

11. The method according to claim 10 , wherein the biometric authentication is performed each time the first operation and the second operation are accepted.

12. The method according to claim 10 , wherein the biometric authentication is always performed while the execution of the other applications is restricted.

13. The method according to claim 10 , wherein the biometric authentication is performed at predetermined time intervals.

14. The method according to claim 8 ,

wherein the mobile information terminal includes a touch panel, and

wherein the method further comprises recognizing the third operation when the touch panel detects that the user's multiple fingers touch the touch panel simultaneously.