Typical SMS messages aren't encrypted, and numerous messaging apps collect metadata, which can reveal who you contact and when. Signal, however, is different.

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 ...

Waltz was removed from his job as national security adviser after he accidentally added a journalist to his Signal chat about an attack on Houthis.