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From: =?UTF-8?Q?J=C3=B6rg_Lorenz?= <hugybear@gmx.net>
Newsgroups: comp.mobile.android
Subject: Re: whatsapp interoperability
Date: Wed, 11 Sep 2024 18:55:17 +0200
Organization: Camembert Normand au Lait Cru
Message-ID: <vbsi1l$42eg$1@solani.org>
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On 11.09.24 18:13, s|b wrote:
> On Wed, 11 Sep 2024 11:15:46 +0100, Richmond wrote:
> 
>> Whatsapp uses the Signal protocol. How did they make open source into
>> closed source? "The Signal Protocol is licensed under the GNU Affero
>> General Public License (AGPLv3). This license requires that the complete
>> source code of the licensed work and any modifications be made available
>> under the same license."
> 
> I don't know the details, but someone explained it like this:
> 
> A Signal user sends a message to a WA user. The encryption is:
> 
> aZ*2
> 
> When it reaches the servers at WA something gets added:
> 
> aZ*2[Vy*3]
> 
> This way data could be gathered by Meta. Meta doesn't give access to
> Signal to check if something like this doesn't happen.
> 
> I don't know if I'm explaining correctly, but if Signal doesn't want to
> cooperate they must have a damn good reason.

No: Signal has absolutely no intention to break their encryption which
is a condition for interoperability. Would Signal do that I would drop
it immediately. Signal uses an end-to-end-encryption which WA does not
really. Alternative suppliers like Signal, Threema, iMsg or Telegram
would commit immediate suicide if they would follow that route.

-- 
"De gustibus non est disputandum."