Received-SPF: pass (sog-mx-1.v43.ch3.sourceforge.com: domain of bitpay.com
	designates 209.85.214.171 as permitted sender)
	client-ip=209.85.214.171; envelope-from=jgarzik@bitpay.com;
	helo=mail-ob0-f171.google.com; 
MIME-Version: 1.0
In-Reply-To: <CA+s+GJCMqcfj+1dALUQyepo=Y3Fk=QWTp5fnmR53VAkOf=3Bwg@mail.gmail.com>
References: <20150204142323.DEC4BE2DCDE@quidecco.de>
	<CA+s+GJCMqcfj+1dALUQyepo=Y3Fk=QWTp5fnmR53VAkOf=3Bwg@mail.gmail.com>
From: Jeff Garzik <jgarzik@bitpay.com>
Date: Fri, 6 Feb 2015 07:08:50 -0800
Message-ID: <CAJHLa0OFNVyB0J0hYOzF3Q4B7fSv0Ow9+LwWxus0eDz6-kZemg@mail.gmail.com>
To: Wladimir <laanwj@gmail.com>
Content-Type: multipart/alternative; boundary=001a113dd2768abe6d050e6ccd64
Cc: Bitcoin Development <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] determining change addresses using the
 least significant digits
Precedence: list

--001a113dd2768abe6d050e6ccd64
Content-Type: text/plain; charset=UTF-8

Yes.  You can certainly add additional inputs and outputs -- and as such
you can increase privacy and defrag your wallet at the same time.


On Fri, Feb 6, 2015 at 2:11 AM, Wladimir <laanwj@gmail.com> wrote:

> On Wed, Feb 4, 2015 at 2:23 PM, Isidor Zeuner
> <cryptocurrencies@quidecco.de> wrote:
>
> > A possible approach to handle this issue would be to add a randomized
> > offset amount to the payment amount. This offset amount can be small
> > in comparison to the payment amount.
> >
> > Any thoughts?
>
> Adding/subtracting a randomized offset amount is one way, but there
> have also been more sophisticated ideas to obfuscate the amount, e.g.
> by adding multiple change outputs or even distributing over multiple
> transactions (potentially coinjoined for further privacy).
>
> Mike Hearn had some ideas regarding obfuscation of payment amounts,
> which still make sense, and he wrote about them here:
> https://medium.com/@octskyward/merge-avoidance-7f95a386692f
>
> Wladimir
>
>
> ------------------------------------------------------------------------------
> Dive into the World of Parallel Programming. The Go Parallel Website,
> sponsored by Intel and developed in partnership with Slashdot Media, is
> your
> hub for all things parallel software development, from weekly thought
> leadership blogs to news, videos, case studies, tutorials and more. Take a
> look and join the conversation now. http://goparallel.sourceforge.net/
> _______________________________________________
> Bitcoin-development mailing list
> Bitcoin-development@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bitcoin-development
>



-- 
Jeff Garzik
Bitcoin core developer and open source evangelist
BitPay, Inc.      https://bitpay.com/

--001a113dd2768abe6d050e6ccd64
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Yes.=C2=A0 You can certainly add additional inputs and out=
puts -- and as such you can increase privacy and defrag your wallet at the =
same time.<div><br></div></div><div class=3D"gmail_extra"><br><div class=3D=
"gmail_quote">On Fri, Feb 6, 2015 at 2:11 AM, Wladimir <span dir=3D"ltr">&l=
t;<a href=3D"mailto:laanwj@gmail.com" target=3D"_blank">laanwj@gmail.com</a=
>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 =
0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=3D"">On W=
ed, Feb 4, 2015 at 2:23 PM, Isidor Zeuner<br>
&lt;<a href=3D"mailto:cryptocurrencies@quidecco.de">cryptocurrencies@quidec=
co.de</a>&gt; wrote:<br>
<br>
&gt; A possible approach to handle this issue would be to add a randomized<=
br>
&gt; offset amount to the payment amount. This offset amount can be small<b=
r>
&gt; in comparison to the payment amount.<br>
&gt;<br>
&gt; Any thoughts?<br>
<br>
</span>Adding/subtracting a randomized offset amount is one way, but there<=
br>
have also been more sophisticated ideas to obfuscate the amount, e.g.<br>
by adding multiple change outputs or even distributing over multiple<br>
transactions (potentially coinjoined for further privacy).<br>
<br>
Mike Hearn had some ideas regarding obfuscation of payment amounts,<br>
which still make sense, and he wrote about them here:<br>
<a href=3D"https://medium.com/@octskyward/merge-avoidance-7f95a386692f" tar=
get=3D"_blank">https://medium.com/@octskyward/merge-avoidance-7f95a386692f<=
/a><br>
<span class=3D"HOEnZb"><font color=3D"#888888"><br>
Wladimir<br>
</font></span><div class=3D"HOEnZb"><div class=3D"h5"><br>
---------------------------------------------------------------------------=
---<br>
Dive into the World of Parallel Programming. The Go Parallel Website,<br>
sponsored by Intel and developed in partnership with Slashdot Media, is you=
r<br>
hub for all things parallel software development, from weekly thought<br>
leadership blogs to news, videos, case studies, tutorials and more. Take a<=
br>
look and join the conversation now. <a href=3D"http://goparallel.sourceforg=
e.net/" target=3D"_blank">http://goparallel.sourceforge.net/</a><br>
_______________________________________________<br>
Bitcoin-development mailing list<br>
<a href=3D"mailto:Bitcoin-development@lists.sourceforge.net">Bitcoin-develo=
pment@lists.sourceforge.net</a><br>
<a href=3D"https://lists.sourceforge.net/lists/listinfo/bitcoin-development=
" target=3D"_blank">https://lists.sourceforge.net/lists/listinfo/bitcoin-de=
velopment</a><br>
</div></div></blockquote></div><br><br clear=3D"all"><div><br></div>-- <br>=
<div class=3D"gmail_signature">Jeff Garzik<br>Bitcoin core developer and op=
en source evangelist<br>BitPay, Inc. =C2=A0 =C2=A0 =C2=A0<a href=3D"https:/=
/bitpay.com/" target=3D"_blank">https://bitpay.com/</a></div>
</div>

--001a113dd2768abe6d050e6ccd64--