Last Wednesday, former national security advisor Mike Waltz was photographed at a cabinet meeting using TeleMessage, a modified version of Signal, the encrypted messaging app that has been the ...

While serving on the National Security Council staff in the Biden administration, I was tasked with strengthening the ...

The company behind the Signal clone used by at least one Trump administration official was breached earlier this month. The ...

A messaging service used by former National Security Advisor Mike Waltz has temporarily shut down while the company investigates an apparent hack. The messaging app is used to access and archive ...

A hacker breached TeleMessage, a government-approved messaging app used by Trump administration officials, exposing archived ...

A leak of information on American military operations caused a major political incident in March 2025. The Security Think ...

A hacker has breached TeleMessage, a Signal fork used by Trump's cabinet and other US officials for communications.

Following earlier adjustments, the White House is trimming and restructuring the National Security Council, sources told CBS News on Friday.

Trump moved to dramatically downsize the National Security Council, that could see the group responsible for coordinating and ...