Comment by snowmobile

Wrong, wrong and wrong. If an app does real E2EE (not "marketing E2EE"), then the servers should have no control over the encryption. Otherwise it's not end-to-end, by definition. Regarding the "private non-interoperable system", the whole point of TFA is that EU made them open it up. See https://engineering.fb.com/2024/03/06/security/whatsapp-mess... Your last "point" is irrelevant because I never claimed anything about the similarity between encryption models. Have you ever heard of a "simile"?