Plus: The Department of Homeland Security begins surveilling immigrants' social media, President Donald Trump targets former CISA director who refuted his claims of 2020 election fraud, and more.

WhatsApp uses Signal's encryption protocol, so your chats and calls are just as end-to-end encrypted as those on Signal. But ...

In what has been dubbed "Signalgate," National Security Adviser Mike Waltz unintentionally included The Atlantic’s ...

WASHINGTON — The Atlantic on Wednesday released the entire Signal chat among senior national security officials ... "based on the policy relevance of attendees to the issues being considered, the need ...

The National Security Agency (NSA) has issued a critical warning to millions of iPhone and Android users regarding the ...

The White House has spent the week trying to downplay the revelation that top national security officials ... on Houthi militants over Signal, a commercial messaging app. In a stunning breach ...

Meanwhile, Federal Judge James Boasberg ordered Trump officials to preserve all communications on Signal, a commercial encrypted messaging app. Officials used the app ... continues to be an issue for ...

An E2EE messaging app will protect your messages as they leave your device and go to someone else’s. Signal also has a good security pedigree. It’s run by a non-profit organization registered ...

More: Is 'Signal' keeping your private info safe ... "there's an operational security issue," he said. Ravey said Hegseth, Waltz or other members of the chat should have immediately reported ...

Secure messaging app Signal has been in the spotlight this week for national-security reasons, but companies can also learn lessons from the Trump administration’s misstep.