They tried to make a fingerprint readers more sophisticated and added a temperature registers to avoid fakes or (more in more gruesome case - a cut off finger),

They tried to make a fingerprint readers more sophisticated and added a temperature registers to avoid fakes or (more in more gruesome case - a cut off finger), but hackers managed to make so called rubber fingers or peel dead finger and fill with a warm salty water. Anything can be hacked. But I think they are missing the point. If Apple wanted its phones to be a secure gimmick at Pentagon - that was silly. But for average user - nobody is going to steal your prints. It's just a usability. For average Joe it is so much easier to tap with finger than type PIN all the time. But if you get specifically targeted nothing will save you.