Microsoft has been demonstrating how biometric logins will work at its Build 2015 conference, with developers showing how the software interacts with fingerprint, facial and iris recognition.

The software giant has revealed that Hello has "enterprise-grade security," which includes a False Acceptance Rate (FAR) of 1/100,000, a False Rejection Rate of 2-4 percent, live-ness measures (to ensure it's not just a photo being shown to the camera, but a living person) and an anti-spoofing detection system that seems to block images that are received from other devices.

Facial recognition will be an important part of Hello, but it only support Intel Real Sense cameras from Intel starting with series f200 (the current series). All devices with IR sensors will be supported as well, but only if they comply with Microsoft's specification.

If users want to access through Windows Hello, they must a biometric login – only those who opt out can continue to use passwords.

In a 17 March blogpost that coincided with the announcement that Windows 10 will launch this summer, Microsoft revealed a range of new details on how the biometric system, known as Windows Hello, will be used with the new operating system.