Company behind modified Signal app used by Mike Waltz allegedly hacked

The Israeli company behind the obscure messaging app former US national security advisor Mike Waltz was photographed using on his iPhone last week was recently hacked, it has been alleged.

The app in question, TM SGNL, is a modified version of the more famous Signal app senior administration officials got themselves into hot water for using in March when The Atlantic journalist Jeffrey Goldberg was accidentally added by Waltz to a classified chat.

No sooner had Waltz been photographed using TM SGNL than researchers started trying to find the app. That didn’t prove to be easy: Unlike Signal, TM SGNL is non-public and can’t be downloaded from the Apple App Store or Google’s Play Store.