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Cc: Bitcoin Development <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] Message Signing based authentication
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Required vs. strongly recommended is an important distinction.  Satoshi
Dice reuses EC Keys for every single transaction.  Exchanges will have the
same address you deposit in over and over, which gets reused.  This is a
best practice argument rather than a protocol requirement.


On Sat, Nov 2, 2013 at 8:27 PM, Luke-Jr <luke@dashjr.org> wrote:

> On Sunday, November 03, 2013 1:19:51 AM Allen Piscitello wrote:
> > I actually had a use case in my case where it was possible, and that was
> > the check I used to get around it, just configured it so that I always
> > generated a new key when I needed to set up a 2 of 2 Multisig Refund Tx.
> >  It was either that or making sure I had no unspent outputs.  The use
> case
> > of doing it was laziness in just creating a single key.
>
> Use cases mean an actual use, not mere laziness. Bitcoin as a system has
> always required a unique EC key (and address) for each transaction.
>
> Luke
>

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<div dir=3D"ltr">Required vs. strongly recommended is an important distinct=
ion. =A0Satoshi Dice reuses EC Keys for every single transaction. =A0Exchan=
ges will have the same address you deposit in over and over, which gets reu=
sed. =A0This is a best practice argument rather than a protocol requirement=
.</div>
<div class=3D"gmail_extra"><br><br><div class=3D"gmail_quote">On Sat, Nov 2=
, 2013 at 8:27 PM, Luke-Jr <span dir=3D"ltr">&lt;<a href=3D"mailto:luke@das=
hjr.org" target=3D"_blank">luke@dashjr.org</a>&gt;</span> wrote:<br><blockq=
uote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc =
solid;padding-left:1ex">
<div class=3D"im">On Sunday, November 03, 2013 1:19:51 AM Allen Piscitello =
wrote:<br>
&gt; I actually had a use case in my case where it was possible, and that w=
as<br>
&gt; the check I used to get around it, just configured it so that I always=
<br>
&gt; generated a new key when I needed to set up a 2 of 2 Multisig Refund T=
x.<br>
&gt; =A0It was either that or making sure I had no unspent outputs. =A0The =
use case<br>
&gt; of doing it was laziness in just creating a single key.<br>
<br>
</div>Use cases mean an actual use, not mere laziness. Bitcoin as a system =
has<br>
always required a unique EC key (and address) for each transaction.<br>
<span class=3D"HOEnZb"><font color=3D"#888888"><br>
Luke<br>
</font></span></blockquote></div><br></div>

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