Hacker News Reader

Apple uses a laser infrared dot projector.

Other manufacturers cheap out on that part, or prioritize design (no notch/camera hole) over security.

"Cheaping out" is not the best description. Apple has riddled the space with a ton of patents. https://insights.greyb.com/apple-facial-recognition-patents/

Microsoft is using IR to do Windows Hello so there must be some workaround to the patents.

How do your eyes do it? (You can do it securely without a lidar by thinking about this.)

How does Apple do it?

"The technology that enables Face ID is some of the most advanced hardware and software that we’ve ever created. The TrueDepth camera captures accurate face data by projecting and analyzing thousands of invisible dots to create a depth map of your face and also captures an infrared image of your face. "

https://support.apple.com/en-us/HT208108