Former national security adviser Mike Waltz defended his use of the messaging app Signal during a confirmation hearing ...

Former National Security Advisor Mike Waltz faced scrutiny over a Signal chat incident during his U.N. ambassador hearing ...

Twitter co-founder Jack Dorsey developed Bitchat, a privacy-focused messaging app that works offline via Bluetooth without ...

Months after the chat was disclosed, questions remain over the controversy, including if federal laws were violated and if ...