One Tech Tip: All you need to know about the iPhone’s Lockdown Mode

A little known security feature on iPhones is in the spotlight after it stymied efforts by U.S. federal authorities to search devices seized from a reporter.

Apple’s Lockdown Mode recently prevented FBI agents from getting into Washington Post reporter Hannah Natanson ‘s iPhone.

Agents seized the phone, as well as two MacBooks and other electronic devices, when they searched Natanson’s home last month as part of an investigation into a Pentagon contractor accused of illegally handling classified information.