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From: Pavol Rusnak <stick@satoshilabs.com>
Date: Thu, 30 Apr 2020 14:14:28 +0200
Message-ID: <CAF90Avnv5a3BfWHf3uSMUsLifn9yOOhe0ORLOFmt3F3Z1MCxMw@mail.gmail.com>
To: SatoshiSingh <SatoshiSingh@protonmail.com>, 
 Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Content-Type: multipart/alternative; boundary="00000000000055ed5305a48102cb"
Subject: Re: [bitcoin-dev] Sorting outputs of a transaction in alphabetic
 order to protect privacy
Precedence: list

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https://github.com/bitcoin/bips/blob/master/bip-0069.mediawiki

--
Best Regards / S pozdravom,

Pavol "stick" Rusnak
CTO, SatoshiLabs

On Thu, Apr 30, 2020, 10:21 SatoshiSingh via bitcoin-dev <
bitcoin-dev@lists.linuxfoundation.org> wrote:

> Hi list. I've been a lurker for quite sometime and this is my first post.
>
> The problem I'm addressing is that generally wallet devs construct the tx
> with the 2nd output being of the sender as change. This helps chain
> analysers to identity addresses and invade the users privacy.
>
> I'm suggesting to sort the outputs in alphabetic order (or by pure random
> order) before broadcasting. This way the chain analyser cannot be sure
> which output is the change output and will improve privacy a little.
>
> Thanks_______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>

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<div dir=3D"auto"><a href=3D"https://github.com/bitcoin/bips/blob/master/bi=
p-0069.mediawiki">https://github.com/bitcoin/bips/blob/master/bip-0069.medi=
awiki</a><br><br><div data-smartmail=3D"gmail_signature">--<br>Best Regards=
 / S pozdravom,<br><br>Pavol &quot;stick&quot; Rusnak<br>CTO, SatoshiLabs</=
div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_at=
tr">On Thu, Apr 30, 2020, 10:21 SatoshiSingh via bitcoin-dev &lt;<a href=3D=
"mailto:bitcoin-dev@lists.linuxfoundation.org">bitcoin-dev@lists.linuxfound=
ation.org</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi list.=
 I&#39;ve been a lurker for quite sometime and this is my first post.<br><b=
r>The problem I&#39;m addressing is that generally wallet devs construct th=
e tx with the 2nd output being of the sender as change. This helps chain an=
alysers to identity addresses and invade the users privacy.<br><br>I&#39;m =
suggesting to sort the outputs in alphabetic order (or by pure random order=
) before broadcasting. This way the chain analyser cannot be sure which out=
put is the change output and will improve privacy a little.<br><br>Thanks__=
_____________________________________________<br>
bitcoin-dev mailing list<br>
<a href=3D"mailto:bitcoin-dev@lists.linuxfoundation.org" target=3D"_blank" =
rel=3D"noreferrer">bitcoin-dev@lists.linuxfoundation.org</a><br>
<a href=3D"https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev" =
rel=3D"noreferrer noreferrer" target=3D"_blank">https://lists.linuxfoundati=
on.org/mailman/listinfo/bitcoin-dev</a><br>
</blockquote></div>

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