The TouchID fingerprint sensor has received a lot of coverage – both good and bad. At its best, experts are calling it a huge step forward for large-scale, consumer-level biometric authentication. At its worst, hackers have figured out how to use fake fingerprints to game the system.
In iOS 7, you can use your fingerprint to authenticate an iTunes Store/App Store purchase. This is where it gets risky as this involves credit card info / spending money. If you're even a little paranoid about someone gaming your iPhone 5s to purchase stuff – the possibility is very very remote – you can feel peaceful by turning off fingerprint authentication for iTunes & App Store purchases.
To turn off fingerprint authentication for iTunes & App Store purchases:
- Open the Settings app
- Tap on General
- Now tap on Passcode & Fingerprint (and enter the passcode when the iPhone asks you to)
- Tap on Fingerprints
- Turn off iTunes & App Store
Whenever you make an iTunes or App Store purchase, you won't be able to finish it without entering your Apple ID password anymore.
On a side note, I don't actually think there's any need to panic or be paranoid about TouchID authenticating your iTunes & App Store purchases. Unless you are asleep and your kid is smart to use your finger to buy Infinity Blade III on your iPhone 5s without waking you up, there's very little to no chance that someone will break into your iPhone 5s to do the damage.
This doesn't mean that you can't be wary of technology or its risks no matter which company it comes from. Even Apple.
iOS 7 also has some other spotted security flaws like users being able to open Siri in Lockscreen, or being able to block Find My iPhone by flipping the Airplane Mode on in Control Center – all without having to bypass the lockscreen.
Make sure you check out other security flaws in iOS 7 here.