Mike Waltz Caught Using App Even Less Secure Than Signal
Trump’s recently ousted national security advisor just keeps making things worse for himself.

The version of Signal that recently ousted national security adviser Mike Waltz was caught checking during a Cabinet meeting Wednesday is an unofficial edition of the app meant to archive messages, according to 404 Media. The archiving capability suggests that the app may not use end-to-end encryption, making it less secure than the standard version of Signal.

In the images, published by Reuters on Thursday, there is a visible message at the bottom of Waltz’s screen asking him to verify his “TM SGNL PIN.” This is different from the standard version of Signal, where this notification just reads “Verify your Signal PIN.” Not only was Waltz using a private, insecure platform to discuss highly sensitive information, he was using the least secure version of that platform to do so. “TM SGNL” refers to a program from software company TeleMessage that captures and stores Signal messages for the user.
White House communications director Steven Cheung on Thursday said that “Signal is an approved app that is loaded onto our government phones.” It’s not clear if other Trump officials are using the far less secure TM SGNL as well.
The latest controversy comes as both Waltz and current Defense Secretary Pete Hegseth have made headlines for multiple Signal chats. On Thursday, Trump removed Waltz from his post as national security adviser and nominated him to be U.S. ambassador to the United Nations.