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More WhatsApp privacy concerns over OS, device info leaks
(www.theregister.com)
This is a most excellent place for technology news and articles.
I read it, I just believe that meta knew what they were doing. I also believe there are other fingerprints they are using while hiding behind the whisper protocol to say they are e2ee.
Oh it's really easy to fingerprint a device on Android so I'm 99% sure they are fingerprinting you in one way or another. But this seems to be an overly complicated way of doing it. It does really just seem like an unintentional design flaw.
If they fix it and randomise then I'd say you're right. But from the article they didn't say they would.