Mobile terminal and method of operating the same

A mobile device comprising:

• a communication interface for communicating with a wearable device;
• a memory storing one or more instructions;
• and
• a processor configured to execute the one or more instructions to:
• receive a user identification information (ID) of the wearable device from the wearable device, the wearable device including a smart watch worn on a wrist of a user;
• perform authentication for the wearable device based on the user ID of the wearable device;
• transmit, to the wearable device, a request for a first captured image of a face of the user in response to the authentication being successful;
• receive, from the wearable device, the first captured image generated by the wearable device, the first captured image being generated by a camera on the smart watch while the mobile device is grabbed by a hand of the user;
• obtain a second captured image of the face of the user generated by a camera of the mobile device, the second captured image being generated by a front camera of the mobile device while the mobile device is grabbed by the hand of the user;
• compare the first captured image and the second captured image;
• and
• execute a predetermined operation of the mobile device according to a result of the comparing,
• wherein the first captured image and the second captured image are simultaneously generated during a time period,
• wherein the processor is configured to execute the one or more instructions to switch an operation mode of the mobile device,
• wherein the operation mode of the mobile device includes a common mode and a personal mode, and
• wherein, in the common mode, one or more applications that are restricted from execution in the common mode are not displayed on a screen for selection, and in the personal mode, the one or more applications that are restricted from execution in the common mode are displayed on the screen for selection.

A non-transitory computer-readable recording medium having recorded thereon a program for executing a method of operating an mobile device, the method comprising:

• receiving a user identification information (ID) of a wearable device from the wearable device, the wearable device including a smart watch worn on a wrist of a user;
• performing authentication for the wearable device based on the user ID of the wearable device;
• transmitting, to the wearable device, a request for a first captured image of a face of the user in response to the authentication being successful;
• receiving, from the wearable device, the first captured image captured by the wearable device, the first captured image being generated by a camera on the smart watch while the mobile device is grabbed by a hand of the user;
• obtaining a second captured image of the face of the user generated by a camera of the mobile device, the second captured image being generated by a front camera of the mobile device while the mobile device is grabbed by the hand of the user;
• comparing the first captured image and the second captured image;
• and
• executing a predetermined operation of the mobile device according to a result of the comparing,
• wherein the first captured image and the second captured image are simultaneously generated during a time period,
• wherein the executing the predetermined operation comprises switching an operation mode of the mobile device,
• wherein the operation mode of the mobile device includes a common mode and a personal mode, and
• wherein, in the common mode, one or more applications that are restricted from execution in the common mode are not displayed on a screen for selection, and in the personal mode, the one or more applications that are restricted from execution in the common mode are displayed on the screen for selection.