Signal protects conversations, but it was never designed to safeguard U.S. war plans — and using it that way carried real risk for American forces.

A monthslong investigation into Defense Secretary Pete Hegseth's use of the commercial messaging app Signal is complete and its classified findings provided to Capitol Hill, according to a person familiar with the review.

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-to-end encryption, often used for private communication.

The White House is clapping back against media reports alleging intelligence officials have been using the end-to-end encrypted messaging app Signal to send classified information, describing the allegations as "false" in a statement to Fox News Digital.

The security of U.S. government officials’ communications has come under the spotlight again after a modified Signal app used to archive data from third-party messaging apps was hacked in less than 30 minutes. The app in question is a cloned version of ...

Q: What’s the difference between Signal and WhatsApp, and should I switch? A: Until recent news involving the Signal app, it was a relatively unknown messaging platform to many nontechnical users compared to WhatsApp. This is illustrated by comparing the ...