[mishafb]

Signal has since changed their encryption methods so that it's harder to know who's sending messages to who, and what groups exist. On WhatsApp, these changes have obviously not been implemented, so it's not true that WhatsApp uses Signal encryption.

[strogonoff]

Based on a shallow scan of Signal protocol’s Wikipedia page, I can’t see any notable changes after 2016, which is when WhatsApp had it integrated. Perhaps the measures you mentioned exist in Signal the client, as opposed to Signal the protocol?

But yes, if using WhatsApp one must keep in mind that FB and third parties know (and probably data-mine) whom (also when, etc.) one’s talking to; this is most likely less of a concern with Signal client.

I have a lot of respect for Signal Foundation, although I question their recent idea of integrating cryptocurrency support into a messaging app.

[windthrown]

One such improvement is the Sealed Sender feature: https://signal.org/blog/sealed-sender/

It's unclear to me is these are part of the "protocol" or just the Signal client.

[sdfhbdf]

i think GP is referring to the signal protocol [0] as the underlying transport of the contents, which should be still true in WhatsApp. Feature parity with Signal app itself in terms of what is encrypted seems to have not been a focus of WhatsApp.

[0]: https://en.wikipedia.org/wiki/Signal_Protocol