Former National Security Advisor Waltz Caught Using Secret Signal Archiving App

A Reuters photographer captured a photo of former National Security Advisor Mike Waltz checking his Signal messages during a Trump cabinet meeting. He wasn't using the official Signal app, but a modified version called TM SGNL, which automatically archives plaintext messages. Developed by TeleMessage, a company with executives linked to the Israeli Defense Forces' intelligence unit, TM SGNL likely violates Signal's open-source license. The app is primarily distributed through enterprise mobile device management (MDM) services, suggesting the Trump administration may have used it for classified discussions and centralized device management. The article also uncovered detailed documentation and a video revealing potential storage locations for chat logs, including Microsoft 365, SMTP, and SFTP. This raises significant security concerns.