---
title: "Discussion on \"How Face ID Works: Infrared Lasers & Neural Networks\" | Hashnode"
description: "Discussion on \"How Face ID Works: Infrared Lasers & Neural Networks\". Face ID doesn't rely on selfies. Discover how it uses 30,000 infrared lasers, 3D geometry mapping, and neural networks to securely authenticate your identity."
url: "https://hashnode.com/posts/how-face-id-works-under-the-hood/6a01e46fe781d97a2711e59f"
---

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# [How Face ID Works: Infrared Lasers & Neural Networks](https://doogal.dev/how-face-id-works-under-the-hood?utm_source=hashnode&utm_medium=feed)

Face ID doesn't rely on selfies. Discover how it uses 30,000 infrared lasers, 3D geometry mapping, and neural networks to securely authenticate your identity.

May 11 · 5 min read · doogal.dev  
Updated Jul 19  
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-   [#authentication](https://hashnode.com/tag/authentication)
-   [#computervision](https://hashnode.com/tag/computervision)
-   [#machinelearning](https://hashnode.com/tag/machinelearning)
-   [#neuralnetworks](https://hashnode.com/tag/neuralnetworks)

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[Doogal Simpson](https://hashnode.com/@doogal)

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