Apple Inc. said it is working on a new security feature that could make it harder for investigators to retrieve data from iPhones, the latest twist in its long-running standoff with law-enforcement agencies over user privacy.
The new software feature, called USB Restricted Mode, is being beta-tested by Apple. It prevents other devices—personal computers, for example—from accessing data on the iPhone via its Lightning port an hour after a phone is last unlocked.
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