Also, Touch ID measures the blood flow and so doesn't work with disembodied fingers: http://www.engadget.com/2013/09/16/why-a-disembodied-finger-cant-be-used-to

Also, Touch ID measures the blood flow and so doesn't work with disembodied fingers: http://www.engadget.com/2013/09/16/why-a-disembodied-finger-cant-be-used-to-unlock-the-touch-id-se/ http://www.engadget.com/2013/09/16/why-a-disembodied-finger-...