Sensor for increasing security using biometric data, mobile device including the same, and authentication method of the mobile device

A mobile device comprising:

• a fingerprint sensor configured to detect fingerprint data of a user contacting a fingerprint acquisition region, the fingerprint acquisition region having a circuit configured to acquire a fingerprint of a finger of the user;
• a plurality of electrodes;
• a bio sensor connected to the electrodes to detect at least one type of biometric data;
• and
• a processor configured to execute computer-readable instructions to control the bio sensor and the fingerprint sensor,
• wherein the processor is configured to use at least one of the fingerprint sensor and the bio sensor based on a selected authentication mode, the processor is configured to selectively use only the fingerprint sensor of the fingerprint sensor and the bio sensor in a first authentication mode and use both the fingerprint sensor and the bio sensor in a second authentication mode.

An authentication device comprising:

• a fingerprint sensor configured to detect fingerprint data of a user contacting a fingerprint acquisition region;
• a plurality of electrodes;
• and
• a bio sensor connected to the electrodes to detect at least one type of biometric data,
• wherein the plurality of electrodes are arranged to form a closed loop with a user upon being contacted by the user.