[EGreg]

I mean attestation of what’s running on the server. Did you click and read?

As for the client — the app store on iOS doesn’t allow reproducible builds.

Telegram tried something close for years, which is how I know they care: https://core.telegram.org/reproducible-builds

But it doesn’t matter because the metadata is equally important and useful to get you. And anyway, end-to-end encryption can be banned, or compromised by a new app update, or secretly removed via a backdoor for some, if you pressure one guy (eg @durov in France, or his team every time they pass through an airport). Read this article — it was my response to Moxie Marlinspike (of Signal fame) years ago when he was skeptical of decentralization:

https://community.intercoin.app/t/web3-moxie-signal-telegram...