A messaging app called Signal based in San Francisco was used by the Trump administration to discuss war plans.

A journalist’s account of being added to a group chat of U.S. national security officials coordinating plans for airstrikes ...

Signal is an end-to-end encrypted messaging app that is considered one of the most secure in the world by security ...

As the White House comes under fire for allegedly using Signal to discuss foreign policy plans, the encrypted messaging ...

Defense Secretary Pete Hegseth and other Trump officials allegedly used Signal for a group chat to discuss a highly sensitive operation.

It's an app that can be used for direct messaging and group chats as well as phone and video calls.Signal uses end-to-end ... to download it on their White House-issued phones were instructed ...