Whatsapp Just Switched on End-to-End Encryption for Hundreds of Millions of Users

"Whatsapp will integrate the open-source software Textsecure, created by privacy-focused non-profit Open Whisper Systems, which scrambles messages with a cryptographic key that only the user can access and never leaves his or her device. The result is practically uncrackable encryption for hundreds of millions of phones and tablets that have Whatsapp installed—by some measures the world’s largest-ever implementation of this standard of encryption in a messaging service."