iPhone 5S may be unlocked with more than your fingerprint. Scroll down to the bottom of this page to read the last two paragraphs:
Lastly, I went with the most secure body part I could think of – and all I will say is that I had to take off my pants. Unlike the knuckle and elbow, however, registering my nether region was a breeze. (It was quite chilly, in fact.) And not only did I successfully register this private part with relative ease, I was also able to use it to unlock the device. I think you can understand why there isn’t a video of this one.