From 4fb696e742c54d3a0c54e08be3aec756d910d1c0 Mon Sep 17 00:00:00 2001
From: fria <138676274+friadev@users.noreply.github.com>
Date: Sun, 29 Dec 2024 00:17:39 -0600
Subject: [PATCH] add additional considerations for fingerprint sensors

---
 blog/posts/biometrics-explained.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/blog/posts/biometrics-explained.md b/blog/posts/biometrics-explained.md
index 449f7d7f..a29a51f5 100644
--- a/blog/posts/biometrics-explained.md
+++ b/blog/posts/biometrics-explained.md
@@ -42,6 +42,12 @@ Ultrasonic fingerprint sensors use sound to create a detailed 3D representation
 
 One downside is that you lose the protection against dead tissue that capacitive sensors offer, but this is not relevant for most people.
 
+### Additional Considerations
+
+Fingerprint unlock will inherently be vulnerable to someone forcing you to put your finger on the sensor to unlock your device, so keep this in mind when threat modeling.
+
+They also won't work with gloves and sometimes screen protectors can interfere, so make sure that the sensor is uncovered and making direct contact with your actual finger.
+
 ## Face Unlock
 
 Many devices come with the capability to unlock them using your face. The implementations of this technology can vary wildly between manufacturers since a secure implementation requires a lot of special hardware, so many OEMs choose to cheap out. All forms of face unlock are more likely to allow a twin or sibling into your device since their face is more similar to yours than a random person off the street, so keep that in mind in your threat model.