In the movies, biometric security is often thwarted with a body part. Need to fool a retina scanner to enter a vault? Well just bring the correct eyeball and you've got the jewels.
Now that the iPhone 5s includes a fingerprint sensor, this has some people wondering if a severed finger can be used to access the Touch ID system. Luckily, Mashable has weighed in on the prospect, and as they say "your fingers are safe."