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Date: Tue, 14 May 2013 10:25:36 -0700
Message-ID: <CANEZrP3zWyDm6rE9_71T0Td46Zg9N8k0HFUSf=DY+4-F0N9snA@mail.gmail.com>
From: Mike Hearn <mike@plan99.net>
To: Jeff Garzik <jgarzik@exmulti.com>
Content-Type: multipart/alternative; boundary=047d7b2e41e6dff3ce04dcb0eb27
Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] merged mining hashcash & bitcoin (Re:
 Coinbase TxOut Hashcash)
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> I've been thinking about a decentralized way to create an anonymous
> identity


This is the fidelity bond/anonymous passport idea that has been kicked
around in the forums quite a few times. I mentioned it on the tor-talk once
as a solution to the problem that you cannot create Google accounts via Tor
without a phone number. It's a good idea but not new. I have encouraged
people to implement a server that does it and then some integration for
MediaWiki, Wordpress or phpBB, as they're both quite common software that
gets a lot of spam and abuse. For instance we could use it on our own wiki
instead of paying the wiki operator (does anyone know what happens to those
funds by the way?).

You don't need GPG or anything like that - the transactions that spend to
fees also contain pubkeys in the inputs, which you own the private keys
for. So you can sign a challenge nonce from the server to prove ownership
of the "passport"/fidelity bond.

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<div dir=3D"ltr"><br><div class=3D"gmail_extra"><div class=3D"gmail_quote">=
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
I&#39;ve been thinking about a decentralized way to create an anonymous<br>
identity</blockquote><div><br></div><div style>This is the fidelity bond/an=
onymous passport idea that has been kicked around in the forums quite a few=
 times. I mentioned it on the tor-talk once as a solution to the problem th=
at you cannot create Google accounts via Tor without a phone number. It&#39=
;s a good idea but not new. I have encouraged people to implement a server =
that does it and then some integration for MediaWiki, Wordpress or phpBB, a=
s they&#39;re both quite common software that gets a lot of spam and abuse.=
 For instance we could use it on our own wiki instead of paying the wiki op=
erator (does anyone know what happens to those funds by the way?).</div>
<div style><br></div><div style>You don&#39;t need GPG or anything like tha=
t - the transactions that spend to fees also contain pubkeys in the inputs,=
 which you own the private keys for. So you can sign a challenge nonce from=
 the server to prove ownership of the &quot;passport&quot;/fidelity bond.</=
div>
</div></div></div>

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