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Date: Tue, 11 Jun 2013 15:44:39 +0200
Message-ID: <CA+s+GJAsmH_LVqV5qs5fPX8NSGyJtzOs6kyC7M27e8JdCLooEg@mail.gmail.com>
From: Wladimir <laanwj@gmail.com>
To: Melvin Carvalho <melvincarvalho@gmail.com>
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Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] Bitcoin addresses -- opaque or not
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On Tue, Jun 11, 2013 at 3:11 PM, Melvin Carvalho
<melvincarvalho@gmail.com>wrote:

> There was some confusion on IRC as to whether bitcoin addresses are opaque
> or not.
>
> https://en.bitcoin.it/wiki/Address
>
> For the sake of argument let's say that opaque means that you can tell
> nothing about the address by examining the characters.
>
> My understanding was that they are NOT opaque, and that if that has
> changed, it will invalidate much at least some wiki page, for examples at
> least some of the following would now be false:
>

How do you define opaque? As far as humans are concerned the addresses are
opaque. They don't tell anything about your country or location, your bank,
your name, they don't even form some kind of hierarchy.

From the viewpoint of the code you could argue they have a meaning "address
type + hashed public key, base58 encoded" thus are not fully opaque. But
it's a long shot, as a hashed value is still very opaque.


> I also here that there is a LIKELY change from the base58 encoding ...
> when was this established?
>

No, there have been no changes to base58. The encoding is still exactly the
same as when Satoshi coined it. Can you show an example of what you mean?

Wladimir

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<div dir=3D"ltr"><br><div class=3D"gmail_extra"><br><br><div class=3D"gmail=
_quote">On Tue, Jun 11, 2013 at 3:11 PM, Melvin Carvalho <span dir=3D"ltr">=
&lt;<a href=3D"mailto:melvincarvalho@gmail.com" target=3D"_blank">melvincar=
valho@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;p=
adding-left:1ex"><div dir=3D"ltr"><div><div><div><div>There was some confus=
ion on IRC as to whether bitcoin addresses are opaque or not.<br>
<br><a href=3D"https://en.bitcoin.it/wiki/Address" target=3D"_blank">https:=
//en.bitcoin.it/wiki/Address</a><br><br></div>
For the sake of argument let&#39;s say that opaque means that you can tell =
nothing about the address by examining the characters.<br><br></div>My unde=
rstanding was that they are NOT opaque, and that if that has changed, it wi=
ll invalidate much at least some wiki page, for examples at least some of t=
he following would now be false:<br>
</div></div></div></blockquote><div><br></div><div style>How do you define =
opaque? As far as humans are concerned the addresses are opaque. They don&#=
39;t tell anything about your country or location, your bank, your name, th=
ey don&#39;t even form some kind of hierarchy.</div>
<div style><br></div><div style>From the viewpoint of the code you could ar=
gue they have a meaning &quot;address type + hashed public key, base58 enco=
ded&quot; thus are not fully opaque. But it&#39;s a long shot, as a hashed =
value is still very opaque.</div>
<div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px =
0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-l=
eft-style:solid;padding-left:1ex"><div dir=3D"ltr"><div><div>I also here th=
at there is a LIKELY change from the base58 encoding ... when was this esta=
blished? =C2=A0<br>
</div></div></div></blockquote><div><br></div><div style>No, there have bee=
n no changes to base58. The encoding is still exactly the same as when Sato=
shi coined it. Can you show an example of what you mean?</div><div style>
<br></div><div style>Wladimir</div><div style><br></div></div></div></div>

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