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Fingerprint sensors currently used in smartphones capture only two-dimensional images of the surface of the finger, so you can easily cheat on a single printed fingerprint. But the flaw is likely to improve soon: A team at the University of California recently developed a new type of 3D fingerprinting technology that uses ultrasonic sensors that are significantly more secure than existing fingerprint sensors.
According to reports, this ultrasonic sensor can scan the surface of the fingerprint gully and the underlying tissue, so a fingerprint alone plan is unable to deceive it.
The basic principle of this sensor is similar to that of medical ultrasound imaging. Researchers have created a miniature ultrasound imager that can be used to observe the shallow tissue near the surface of a fingerprint. Specifically, the transducer on the surface of the scanning chip emits an ultrasonic pulse. The pulse is reflected when it reaches the surface of the finger, and the sensor can obtain the three-dimensional fingerprint of the fingerprint by using the reflected pulse.
The research team used the existing Micro-Electro-Mechanical Systems (MEMS) technology in making the imager - and that was the technology on which the functions of the smart phone's microphone and position-orientation were based, and improved on that basis.
In addition to biometrics and information security, this new technology can be used in many other areas, such as low-cost medical diagnostic tools or personal health monitoring devices.
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