From 91e89ea26c3b9b139b5560e6cece5cf26d63535b Mon Sep 17 00:00:00 2001
From: fria <138676274+friadev@users.noreply.github.com>
Date: Sat, 30 Nov 2024 23:51:09 -0600
Subject: [PATCH] add optical sensor

---
 blog/posts/biometrics-explained.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/blog/posts/biometrics-explained.md b/blog/posts/biometrics-explained.md
index 3cf3a3cd6..0dbfecefe 100644
--- a/blog/posts/biometrics-explained.md
+++ b/blog/posts/biometrics-explained.md
@@ -24,4 +24,6 @@ There four main ways we accomplish this: optical sensors, capacitive sensors, ul
 
 ### Optical Fingerprint Sensors
 
+An optical sensor works just like you'd think it would: by taking a picture of your fingerprint and turning it into data. These are the cheapest and least secure option. They're potentially vulnerable to an attacker simply taking a picture of your fingerprint, since they only capture a two-dimensional image.
 
+Many devices implement one of these sensors under the display, you can tell if you're does because it will flashbang you when you try to scan your finger. This happens so the optical sensor can capture a clear image of your finger.