Technical analysis of TM SGNL, the unofficial Signal app Trump officials used

Yesterday, a Reuters photographer captured a photo of the freshly-ousted former National Security Advisor Mike Waltz checking his Signal messages during a Trump cabinet meeting. If you're not familiar with Waltz, he's most well known for inviting The Atlantic's editor-in-chief to secret Trump administration war crimes Signal group. They discussed, and executed, bombing an urban apartment building full of civilians to kill a single man. 404 Media journalist Joseph Cox published a story pointing out that Waltz was not using the official Signal app, but rather "an obscure and unofficial version of Signal that is designed to archive messages" called TM SGNL. Zoomed-in crop of the Reuters photo showing Mike Waltz using the TM SGNL app. Images credit: REUTERS/Evelyn Hockstein This app uses Signal's servers, making it possible for Waltz to send end-to-end encrypted messages to normal Signal users, like Jeffrey Goldberg from The Atlantic, for example. However unlike the Signal end of the en ... Read full article.