Method of enabling and disabling operating authority of handheld device

A method of enabling and disabling operating authority of a handheld device, comprising:

• a) detecting a holding action of a user via at least one fingerprint sensor of the handheld device;
• b) generating holding data when detecting the holding action of the user, wherein the holding data comprises fingerprint composite data, the fingerprint composite data corresponds to at least one fingerprint of at least one finger pressing on the at least one fingerprint sensor or a palm print of a palm of the user pressing on the at least one fingerprint sensor;
• c) retrieving a plurality of preset holding data, wherein the plurality of preset holding data respectively correspond to a plurality of operating authorities, wherein the plurality of preset holding data respectively correspond to a plurality of different combinations of files stored in the handheld device, the plurality of operating authorities are configured to enable the combination of files corresponding to the same preset holding data to be searched, read, edited, converted or accessed, and one of the plurality of operating authorities is read only operating authority;
• d) performing a fingerprint verification on the fingerprint composite data of the holding data;
• e) determining that the fingerprint composite data passes the fingerprint verification when the fingerprint composite data is matched with preset fingerprint composite data of one of the plurality of preset holding data, and controlling the handheld device to enable the corresponding operating authority for enable the combination of files corresponding to the matched preset holding data to be searched, read, edited, converted or accessed, wherein all the files stored in the handheld device are configured to be read only if the operating authority being enabled is the read only operating authority;
• f) determining that the fingerprint composite data fails to pass the fingerprint verification when the holding data is not matched with all of the preset holding data, and controlling the handheld device to enable a stranger operating authority, wherein the stranger operating authority is configured to allow a display screen of the handheld device to display only the information related to an owner of the handheld device or allow the handheld device to communicate only with a specific device;
• g) continually or intermittently detecting the holding action of the user via the at least one fingerprint sensor;
• and
• h) controlling the handheld device to disable the operating authority when the holding action is not detected.