Elcomsoft is spreading the warning in a slide presentation, telling law enforcement “don’t look at the screen, or else.” If they even glimpse at an iPhone’s TrueDepth camera, according to Elcomsoft, they could encounter the same problem Apple executive Craig Federighi did when showing off Face ID in 2017 — a locked phone demanding a passcode.

“This is quite simple. Passcode is required after five unsuccessful attempts to match a face,” Elcomsoft CEO Vladimir Katalov explained to Motherboard. “So by looking into [a] suspect’s phone, [the] investigator immediately lose[s] one of [the] attempts.”

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