New patent hints at ‘Wrist ID’ for Apple Watch

Apple has filed a patent for a light sensor on the back of its Watch that can authenticate users. In other words, you could unlock the device automatically whenever you put it on. I, for one, welcome my Wrist ID overlord.

The idea behind the Wrist ID unlock technology is deliciously simple: a component on the back of the wearable fires light into the user’s wrist. This is then used to generate a field image of the area. This vein-filled section of each person’s arm should be as unique as a fingerprint, meaning the scan will be able to ensure that it’s you who put the Apple Watch on.

If you’d like more in-depth info about how it works, you can read the full patent here.