The team led by U.S. President Donald Trump's national security adviser, Mike Waltz, set up at least 20 group chats on the ...

Democratic leaders of key House committees are reigniting calling for National Security Advisor Mike Waltz to step down.

President Trump suggested Wednesday that the encrypted Signal messaging platform his top national security brass used to plan ...

Even if Signal had perfect, uncrackable security, high-level White House staff using it to discuss classified information ...

The encrypted messaging app Signal is receiving ... In a lengthy post to X, Signal addressed this issue by pushing back on the Pentagon’s use of the term “vulnerability.” ...

Learn more about Signal, including whether the news about its use in a military intelligence breach impacts its effectiveness ...

The move comes soon after far-right activist Laura Loomer urged Trump to purge staffers she deemed insufficiently committed ...

White House staffers have come under fire after allegedly using the app to discuss sensitive foreign policy plans.

Communications on Signal, including Signal Stories and your user profile, are end-to-end encrypted by default. That means the data is scrambled in transit and can only be seen by the sender and ...

Signal’s encryption protocol is open source ... to notify someone that they should check for a classified message sent ...

Government ministers routinely use encrypted messaging apps including WhatsApp and Signal amid concerns they might be used to ...