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SSUPII@sopuli.xyz to Lemmy Shitpost@lemmy.world – 512 points –
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Biometrics is good for identification, not authentication.

This is why.

This is a meme. If you actually tried to use the severed finger, it wouldn't work.

huh TIL.

Radio frequency -- RF waves do not respond to the dead layer of skin on the outside of your finger -- the part that might be chapped or too dry to be read with much accuracy -- and instead reads only the living tissue underneath. This produces an extremely precise image of your print, and ensures that a severed finger is completely useless.... This means that the Touch ID sensor should be remarkably accurate for living creatures, but it also means that only a finger attached to a beating heart will be able to unlock it. source