there is a better personal data protection system. Because It is clearly that used touch ID in the determine using handwriting as a password to present unauthorized access to your iphone without permission. The technology behind Touch ID.There’s a lot of technology at work below the surface of the Home button. Touch it and the surrounding stainless steel ring detects your finger and wakes the capacitive touch sensor. The laser-cut sapphire crystal surface of the button then directs the image of your finger to the sensor, which reads beneath the outer layers of your skin to get a detailed fingerprint. Software then reads the ridges of your fingerprint and finds the match to unlock your phone.