Is Signal ‘vulnerable?’: Misleading reports raise concerns about app’s safety

The encrypted messaging app Signal is receiving renewed attention after high-level members of President Donald Trump's administration inadvertently added a journalist to a group chat discussing military action in Yemen.

Questions about the security of Signal, which is widely regarded as the gold standard for encrypted communications, have also been raised after a Pentagon briefing titled "Signal Vulnerability" was shared by NPR just days later.

The Pentagon-wide advisory—which...