A security system that monitors heart rate could be more secure and convenient than fingerprint or facial-recognition biometrics.

With the iPhone X, smartphone market leader Apple may have announced that fingerprint sensors are out and facial recognition is in as the hot new biometric technology — but that doesn’t mean there aren’t some intriguing alternatives on the horizon.

Smart new tech from researchers at the State University of New York at Buffalo, who have developed a computer security system that uses radar to read your personal heart rate signature.

“We developed this non-contact and continuous heart biometric system using the a new Doppler radar sensor,” Wenyao Xu, an assistant professor in the University at Buffalo’s department of computer science and engineering, told Digital Trends.

“Working like a Wi-Fi router, our sensor can send a wireless signal and receive the bounced-back signal, coupled with the user’s heart motion and geometrical traits.

We use these features to identify users because each individual has unique heart traits.”

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