iOS 12, the next release of Apple's iPhone operating system, may include features to prevent someone from unlocking your phone without your permission:
The feature essentially forces users to unlock the iPhone with the passcode when connecting it to a USB accessory everytime the phone has not been unlocked for one hour. That includes the iPhone unlocking devices that companies such as Cellebrite or GrayShift make, which police departments all over the world use to hack into seized iPhones.
"That pretty much kills [GrayShift's product] GrayKey and Cellebrite," Ryan Duff, a security researcher who has studied iPhone and is Director of Cyber Solutions at Point3 Security, told Motherboard in an online chat. "If it actually does what it says and doesn't let ANY type of data connection happen until it's unlocked, then yes. You can't exploit the device if you can't communicate with it."
This is part of a bunch of security enhancements in iOS 12:
Other enhancements include tools for generating strong passwords, storing them in the iCloud keychain, and automatically entering them into Safari and iOS apps across all of a user's devices. Previously, standalone apps such as 1Password have done much the same thing. Now, Apple is integrating the functions directly into macOS and iOS. Apple also debuted new programming interfaces that allow users to more easily access passwords stored in third-party password managers directly from the QuickType bar. The company also announced a new feature that will flag reused passwords, an interface that autofills one-time passwords provided by authentication apps, and a mechanism for sharing passwords among nearby iOS devices, Macs, and Apple TVs.
A separate privacy enhancement is designed to prevent websites from tracking people when using Safari. It's specifically designed to prevent share buttons and comment code on webpages from tracking people's movements across the Web without permission or from collecting a device's unique settings such as fonts, in an attempt to fingerprint the device.
The last additions of note are new permission dialogues macOS Mojave will display before allowing apps to access a user's camera or microphone. The permissions are designed to thwart malicious software that surreptitiously turns on these devices in an attempt to spy on users. The new protections will largely mimic those previously available only through standalone apps such as one called Oversight, developed by security researcher Patrick Wardle. Apple said similar dialog permissions will protect the file system, mail database, message history, and backups.