How to enable USB Restricted Mode in iOS 11.4.1


On the day of its official release, technology security gurus are raising a red flag over Apple's new security feature, USB Restricted Mode.

However, there seems to be a loophole in Apple's implementation as discovered by ElcomSoft. Once the feature is enabled, an iPhone becomes inaccessible to any third-party software over USB if its screen is locked for one hour.

Elcomsoft engineer Oleg Afonin noted that testing showed that once USB Restricted Mode kicks in, there is no obvious way to break it. In order to let the accessory connect, you have to unlock the iPhone with a passcode, Touch ID, or Face ID. Apple says that it added USB Restricted Mode to iOS to increase device security against a known means of hacking, which notably has been used by law enforcement personnel to extract the contents of criminal suspects' phones without their permission.

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However, if the device is connected to a Lightning accessory - including one that has never been connected before - the one-hour countdown timer to initiate USB Restricted Mode will be reset.

Most USB accessories, such as Apple's Lightning-to-USB 3 Camera Adapter, can disable the countdown timer, he claims. All iOS 11.4, 11.4.1 and iOS 12 users are recommended to downgrade to 11.4 beta 3 for jailbreak! Once complete, you will be notified and will have the ability to set the device up as an entirely new device or restore it from a compatible iTunes or iCloud backup. "Apple already took care of the people who don't want the new feature, so we'd like to see some love for those of us who just can't have too much security", he said. According to ElcomSoft, a fix could render numerous Lightning accessories useless - though it might be possible to make sure the iOS device only communicates with devices that were previously plugged into it. This unassuming little box can inject code into a locked iPhone that churns for a few hours or days before displaying the device's passcode. They have already issued an update of their own. Does installing iOS 11.4.1 fix the issue, or are there better alternatives to solving it?

"We don't know if this behavior is here to stay, or if Apple will change it in near future".