The phone then produces a digital template (again, not an image) based on that scan. In other similar systems, software then runs such a template through a cryptographic hashing process, making it virtually impossible to recreate the original print from the template. If that's how Touch ID works, the hashing process should make it harder—if not impossible—to spoof your prints. For further security, your fingerprint is never stored in the cloud or anywhere in the phone's memory—only in a secure area of the A7 chip itself.
We don't yet know all the details about how iOS 7 will use the fingerprints it detects. But we do know that it will let you bypass the lockscreen passcode. (You do have a lockscreen passcode, right?) It will also let you authenticate with iCloud and the App Store using your finger.
With all this new technology and speed on the iPhone 5s, is the battery life worse than that of the iPhone 5?
Apple claims that the iPhone 5s offers battery life equal to or greater than that of the iPhone 5. Specifically, the company says the iPhone 5s offers 10 hours of 3G talk time, 10 hours of LTE or Wi-Fi browsing, or 250 hours of standby time. Compare that to Apple's claims for the iPhone 5 when that model was released: 8 hours of 3G talk time, 10 hours of Wi-Fi browsing, or 225 hours of standby time.
Apple says that the iPhone 5c's battery life is identical to that of the iPhone 5s. We'll of course thoroughly test each model's battery life in the coming weeks.
Accessories and apps
Is the 5s exactly the same size as the 5? Will my existing accessories and cases work? What about the iPhone 5c?
The iPhone 5s is indeed exactly the same size as the iPhone 5, so existing iPhone 5 cases will fit the new iPhone 5s. However, the camera and LED flash on the iPhone 5s differ in size and position from those on the iPhone 5, so existing cases may partially obscure the lens and/or LED—or may be close enough to obscuring them that the case affects flash or photo quality. If you want to use a case not specifically made for the iPhone 5s, be sure the opening(s) for the camera and flash are large enough to avoid this problem.
Cases aside, existing iPhone 5 accessories—docks, speaker docks, chargers, and the like—should all work with the iPhone 5s. Similarly, with the exception of dock cradles custom-fit for the iPhone 5s, most of these accessories should work fine with the iPhone 5c.
Of course, cases for the iPhone 5 and 5s won't fit the iPhone 5c, due to the latter's different dimensions and slightly different shape.
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