User device, method for setting password thereof, and operating method for setting and confirming password thereof

A method for setting a password used to run an application of a user device according to an embodiment of the present invention comprises the steps of: requesting input of a password; and requesting device binding information of a user device corresponding to the password. In this case, the device binding information is user-specific information stored in the user device. The device binding information may be obtained from one or more of contact information, a photo, an e-mail, a file, and an address.