Chris Welch, writing for The Verge:
Apple today released iOS 11.4.1, and while most of us are already looking ahead to all the new stuff coming in iOS 12, this small update contains an important new security feature: USB Restricted Mode. Apple has added protections against the USB devices being used by law enforcement and private companies that connect over Lightning to crack an iPhone’s passcode and evade Apple’s usual encryption safeguards.
If you have an iPhone, you should install this when you get the chance.