Signal has been the most high-profile app in the news lately because of the controversy surrounding its use by Defense Secretary Pete Hegseth. Signal is a secure messaging platform known for end ...

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Serious national security concerns have been brought to the forefront this week — and they’re linked to a secure messaging app called Signal. White House staffers have come under fire after ...

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What is Signal, the chat app used by US officials to share attack plans? By KELVIN CHAN The Associated Press,Updated March 26, 2025, 10:02 a.m.

Signal, the app in question in this case, is end-to-end encrypted (E2EE). That means that messages are sent in an encrypted format and can only be read by the recipient.