What Actually Happens When You Send a WhatsApp Message?

You type “Are you home?”, tap send and almost instantly see the message appear on the other person’s phone. It feels like the words have travelled directly from one screen to another, but that is not what happens. Your message passes through a sophisticated network involving your phone, WhatsApp’s servers, encryption systems and the recipient’s device. Yet the actual message content is protected along the way. WhatsApp has used end-to-end encryption by default for personal conversations since 2016, with the Signal Protocol forming the foundation of that protection.