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Mike Waltz Caught Using Modified Signal App for Message Archiving

Photographs reveal Waltz using TM SGNL, a TeleMessage variant of Signal, raising concerns about encryption integrity and compliance with federal records laws.

Michael Waltz looks at his phone as he prepares for a TV interview at the White House on May 01, 2025 in Washington, DC.
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Overview

  • Outgoing National Security Advisor Mike Waltz was photographed using TM SGNL, a modified version of Signal designed by TeleMessage for archiving encrypted communications.
  • TM SGNL captures all incoming and outgoing messages, undermining Signal's native end-to-end encryption while meeting federal records preservation requirements.
  • The U.S. government has purchased licenses for TeleMessage's archiving tools, including versions of Signal and WhatsApp, as part of compliance with the Presidential Records Act.
  • Waltz's use of TM SGNL follows a March incident where he and other officials inadvertently exposed classified military discussions via Signal, prompting legal and political fallout.
  • President Trump removed Waltz from his National Security Advisor role and nominated him as U.S. Ambassador to the United Nations, with Marco Rubio stepping in as interim replacement.