Smart watch and method for controlling same

A method to control a smart watch, the method comprising:

• registering, by the smart watch, a plurality of different fingerprints;
• detecting, by the smart watch, one or more fingerprints of a user in connection with initiating an operation;
• authenticating, by the smartwatch, the user based on comparing the detected fingerprints and the registered fingerprints, wherein authenticating the user includes identifying a quantity of the detected fingerprints that correspond to the registered fingerprints, and determining that the user is authenticated when at least one of the detected fingerprints corresponds to the registered fingerprints;
• and
• when the user is authenticated, performing, by the smart watch, the operation according to the quantity of the detected fingerprints that correspond to the registered fingerprints,
• wherein performing the operation includes
• outputting first content and second content when two or more of the detected fingerprints correspond, respectively, to two or more of the registered fingerprints, and
• outputting the first content and not the second content when only one of the detected fingerprints corresponds to one of the registered fingerprints,
• wherein the first content and the second content are not displayed when the user is not authenticated, and
• wherein performing the operation further includes
• outputting a first graphical symbol associated with performing a first operation when one of the fingerprints detected by the fingerprint sensor corresponds to one of the stored fingerprints;
• and
• concurrently outputting the first graphical symbol and a second graphical symbol associated with performing a second operation when two or more of the fingerprints detected by the fingerprint sensor correspond, respectively, to two or more of the stored fingerprints.