<ul><li>The Signal messaging app is under scrutiny after a journalist was inadvertently added to a secret chat of senior White House officials.</li><li>The US National Security Council is investigating how the journalist's number was added to the chat.</li><li>The use of a commercial messaging app for discussing secret military plans has raised security concerns.</li><li>Signal is a messaging app with end-to-end encryption, owned by a US-based non-profit organization.</li></ul>

Signal App In Spotlight Amid Secret Chat Controversy Of US Officials

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