Current and former US officials have told CNN they believe two texts sent by national security adviser Mike Waltz and CIA ...

U.S. officials seek to curb the militants’ attacks on ships in the Red Sea, but the group was not deterred by strikes in the ...

A federal judge has ordered the Trump administration to preserve records of a text message chat in which senior national ...

Top government officials used Signal to discuss air strikes on Houthi targets in Yemen as the Trump administration stepped up ...

Trump's senior Cabinet members have struggled to explain how such details ended up on an unclassified Signal chat.

Signal’s convenience and the lack of clear agency guidelines makes the commercial app a popular choice for government ...

A powerful U.S. Senate Republican called on Wednesday for an independent probe of Trump administration officials' discussion ...

The National Security Agency sent a bulletin in February warning of Russian hackers trying to access encrypted conversations ...

Defence Secretary Pete Hegseth is facing criticism for bringing his wife to high-level meetings with foreign military ...

A federal judge on Thursday ordered the Trump administration to preserve all Signal communications over the span of several ...

Government and military officials handle classified discussions within SCIF rooms to safeguard top-secret information from ...

The messaging app was created by a one-time anarchist to help activists, journalists, and others communicate beyond the ...