WhatsApp now uses the Signal Protocol to provide end-to-end encryption for its messages, ensuring that only the sender and recipient can read the content of their conversations. This integration allows WhatsApp to secure various forms of communication, including chats, group messages, and voice calls.
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Discussion
Look at the comparison chart below. Message content may be encrypted in WhatsApp but metadata in retained and monetized by Facebook. Plus WhatsApp is now closed source so who knows what Zuckerberg and his goons have done under the hood.