How the iris scanner on the Lumia 950 and 950 XL works

4:37 PM

Microsoft revealed info about all new Windows Phone devices and the new features on October 6 and we have already discussed about it in our earlier posts.
 And among them Lumia 950XL and 950 had some unique specs. And Iris scanner was one among them.

You need first to set up a PIN for the device, which acts as a backup system. Then, when you need to unlock your phone, the infrared camera is first used to light up your eyes. At the same moment, the second camera takes a picture of your eyes, which works in different lighting conditions (the darker the environment, the better it works).
With your biometric information captured a mathematical calculation is performed to create a hash that is checked against the hash stored on your device. If everything checks out, then you will be allowed to get into your phone. While the internal process to make it all happen is rather more complex, it's a very fast process that should never take more than 2 seconds.
The feature is built on a technology called "asymmetric key cryptography" that has been around for years. You'll find asymmetric-key cryptography on other solutions, such as smart cards, and it's also based on the Microsoft's Kinect sensor.

According to Microsoft, Windows Hello is designed with privacy in mind, no image of your face or iris is ever stored on your device. Instead, the authentication happens locally, and your biometric information is never transmitted outside of your device to any server. There would be no photos of you unless you did a selfie with the regular camera!
Using your biometric information to unlock Windows 10 makes your device more secure and easier to use at the same time. And don't worry, no one will be able to pass through the lock screen with a photo of your face and it also works with twins. If you wear normal glasses the system also works. As such only you are the only one that can unlock your phone using Windows Hello.

Source : Windows central

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