The GSM standard includes 4 levels of phone-to-base station encryption, labelled A5/0 to A5/3. A5/0 is no encryption – all conversations are in plaintext and open to anyone able to listen in.

Signal is an end-to-end encrypted messaging app that is considered one of the most secure in the world by security professionals, but was never intended to be the go-to choice for White House ...

WhatsApp introduced passkey-encrypted backups, adding an extra layer of security by letting users protect their chat history with passwordless authentication.

A paper was published that revealed that mobile phone networks in the 1990s and 2000s were vulnerable to fundamental cryptographic algorithms. Cryptographic experts conclude that 'early mobile ...