That's basically exactly what is happening, What's app just hides if from you. But you can verify each others keys in Whatsapp. If you use Signal, you can do i

That's basically exactly what is happening, What's app just hides if from you. But you can verify each others keys in Whatsapp. If you use Signal, you can do it basically. Same for Matrix. Its just that these systems try to make it so people don't have to know anything about this to use it securely.