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Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference?

Cross-posted to 3 groups.

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On 2026-09-11 22:16, R.Wieser wrote:
> Carlos,
> 
>>> iow, if you offer the raw text to the messaging app you already have to
>>> trust that the app will not MITM the conversation or also send a
>>> duplicate
>>> to the message-apps company (or elsewhere).
>>
>> Can the app, on install, create automatically an encryption key that only
>> exists on the app?
> 
> Than *you already trust the app* not to do either of what I mentioned, and
> you quoted, in the above.

Use open source.

> 
>> Then send the public part to the server, so that any client can download
>> the public key of anyone they want to message.
> 
> A messaging app could use *a* public key, not necessarily that of the
> intended receipient.  Can you view the public key use by the app for the
> current E2E message ?   If not ....
> 
> ... and even if you can that doesn't mean that that is the key thats used
> ...
> 
> Yes, there is a LOT of trust for the app involved. :-( :-)

Again, use open source.

> 
>> All clients would do the same.
>>
>> The private key, only exists on the client.
>>
>> Just as PGP in email, but automatic. Would that work?
> 
> Only if you trust the messaging-app not to pull a fast one - again, see what
> you quoted.
> 
> Regards,
> Rudy Wieser
> 
> 


-- 
Cheers, Carlos.
ES🇪🇸, EU🇪🇺;

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Zero-Knowledge Encryption vs End-to-End Encryption: What’s the Difference? Kim JongUn <USAandNK@WorkersParty.org> - 2026-09-09 20:41 +0200
  Re: Zero-Knowledge Encryption vs End-to-End Encryption: What’s the Difference? "Carlos E.R." <robin_listas@es.invalid> - 2026-09-09 21:34 +0200
  Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? "R.Wieser" <address@is.invalid> - 2026-09-09 22:22 +0200
    Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? Kim JongUn <USAandNK@WorkersParty.org> - 2026-09-09 22:50 +0200
      Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? "R.Wieser" <address@is.invalid> - 2026-09-10 07:43 +0200
    Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? Hermes <noreply@oc2mx.net> - 2026-09-11 17:30 +0000
      Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? "R.Wieser" <address@is.invalid> - 2026-09-11 20:07 +0200
        Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? Hermes <noreply@oc2mx.net> - 2026-09-11 18:29 +0000
          Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? "R.Wieser" <address@is.invalid> - 2026-09-11 21:55 +0200
            Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? Hermes <noreply@oc2mx.net> - 2026-09-11 20:32 +0000
              Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? "R.Wieser" <address@is.invalid> - 2026-09-12 08:22 +0200
            Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? Librarian2025 <librarian2025@cock.li> - 2026-09-16 00:32 -0500
              Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? "R.Wieser" <address@is.invalid> - 2026-09-16 08:44 +0200
              Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? Gab_Virebent <gabriel1@virebent.invalid> - 2026-09-16 09:28 +0200
                Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? "R.Wieser" <address@is.invalid> - 2026-09-16 15:45 +0200
                Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-16 18:57 +0100
                Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? "R.Wieser" <address@is.invalid> - 2026-09-16 21:40 +0200
                Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-17 00:46 +0100
                Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? "R.Wieser" <address@is.invalid> - 2026-09-17 09:38 +0200
                Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-17 10:32 +0100
                Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? "R.Wieser" <address@is.invalid> - 2026-09-17 19:12 +0200
                Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-18 11:16 +0100
                Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? "R.Wieser" <address@is.invalid> - 2026-09-18 15:03 +0200
                Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? Librarian2025 <librarian2025@cock.li> - 2026-09-17 01:12 -0500
                Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? "R.Wieser" <address@is.invalid> - 2026-09-17 09:46 +0200
                Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? Librarian2025 <librarian2025@cock.li> - 2026-09-17 13:54 -0500
                Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? "R.Wieser" <address@is.invalid> - 2026-09-17 22:11 +0200
        Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? "Carlos E.R." <robin_listas@es.invalid> - 2026-09-11 20:31 +0200
          Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? "R.Wieser" <address@is.invalid> - 2026-09-11 22:16 +0200
            Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? "Carlos E.R." <robin_listas@es.invalid> - 2026-09-11 22:44 +0200
              Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? "R.Wieser" <address@is.invalid> - 2026-09-12 08:42 +0200
                Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-12 10:46 +0100
                Re: Zero-Knowledge Encryption vs End-to-End Encryption: What's the Difference? "R.Wieser" <address@is.invalid> - 2026-09-12 14:08 +0200

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