iOS 11 makes it a little harder for someone else to get data off your phone

If someone takes your iPhone, can they get your data too?
For years, Apple has been working to make sure the answer is no. The iPhone’s local storage drive has strong encryption, and without a passcode or a fingerprint, there’s no way to get past the lockscreen. If the phone powers down or goes 48 hours without a login, it locks down even further, requiring a passcode to restart. It’s a huge problem for phone thieves — and, as the San Bernardino case demonstrated, makes l