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Posts Tagged ‘lightning’

iOS 11.4 to Disable USB Port After 7 Days: What It Means for Mobile Forensics

Tuesday, May 8th, 2018

UPDATE June 2, 2018: USB Restricted Mode did not make it into iOS 11.4. However, in iOS 11.4.1 Beta USB Restricted Mode Has Arrived

A new iOS update is about to roll out in the next few weeks or even days. Reading Apple documentation and researching developer betas, we discovered a major new security feature that is about to be released with iOS 11.4. The update will disable the Lightning port after 7 days since the device has been last unlocked. What is the meaning of this security measure, what reasons are behind, and what can be done about it? Let’s have a closer look.

USB Restricted Mode in iOS 11.4

In the iOS 11.4 Beta, Apple introduced a new called USB Restricted Mode. In fact, the feature made its first appearance in the iOS 11.3 Beta, but was later removed from the final release. This is how it works:

“To improve security, for a locked iOS device to communicate with USB accessories you must connect an accessory via lightning connector to the device while unlocked – or enter your device passcode while connected – at least once a week.”

The functionality of USB Restricted Mode is actually very simple. Once the iPhone or iPad is updated to the latest version of iOS supporting the feature, the device will disable the USB data connection over the Lightning port one week after the device has been last unlocked. (more…)