251 lines
8.3 KiB
HTML
251 lines
8.3 KiB
HTML
<!DOCTYPE html>
|
|
<html lang="en-us">
|
|
|
|
<head>
|
|
<link href="http://gmpg.org/xfn/11" rel="profile">
|
|
<meta http-equiv="X-UA-Compatible" content="IE=edge">
|
|
<meta http-equiv="content-type" content="text/html; charset=utf-8">
|
|
|
|
<!-- Enable responsiveness on mobile devices-->
|
|
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1">
|
|
|
|
<title>
|
|
|
|
Why Wright's proof is a fake · Caught in the Net
|
|
|
|
</title>
|
|
|
|
<!-- CSS -->
|
|
<link rel="stylesheet" href="/public/css/poole.css">
|
|
<link rel="stylesheet" href="/public/css/syntax.css">
|
|
<link rel="stylesheet" href="/public/css/hyde.css">
|
|
|
|
<!-- Icons -->
|
|
<link rel="apple-touch-icon-precomposed" sizes="144x144" href="/public/apple-touch-icon-144-precomposed.png">
|
|
<link rel="shortcut icon" href="/public/favicon.ico">
|
|
|
|
<!-- RSS -->
|
|
<link rel="alternate" type="application/rss+xml" title="RSS" href="/atom.xml">
|
|
</head>
|
|
|
|
|
|
<body class="theme-base-09">
|
|
|
|
<div class="sidebar">
|
|
<div class="container sidebar-sticky">
|
|
<div class="sidebar-about">
|
|
<h1>
|
|
<a href="/">
|
|
Caught in the Net
|
|
</a>
|
|
</h1>
|
|
<p class="lead"></p>
|
|
</div>
|
|
|
|
<nav class="sidebar-nav">
|
|
<a class="sidebar-nav-item" href="/">Home</a>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<a class="sidebar-nav-item" href="/about/">About</a>
|
|
|
|
|
|
|
|
|
|
|
|
<a class="sidebar-nav-item" href="/archive/">Archive</a>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<a class="sidebar-nav-item" href="/contattami/">Contact me</a>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<a class="sidebar-nav-item" href="/atom.xml">RSS</a>
|
|
<a class="sidebar-nav-item" href="http://francescomecca.eu:3000">Personal Git</a>
|
|
<span class="sidebar-nav-item" href="" >Powered by Jekyll and Hyde</span>
|
|
</nav>
|
|
|
|
<p>© 2016. CC BY-SA 4.0 International </p>
|
|
</div>
|
|
</div>
|
|
|
|
<h3 class="masthead-title">
|
|
<a href="/" title="Home">Caught in the Net</a>
|
|
|
|
|
|
</h3>
|
|
|
|
<div class="content container">
|
|
<div class="post">
|
|
<h1 class="post-title">Why Wright's proof is a fake</h1>
|
|
<span class="post-date">03 May 2016</span>
|
|
<p>I explained in my previous <a href="http://francescomecca.eu/pescewanda/2016/04/17/wright-nakamoto/">post</a> (in italian) that the signature that Wright provided as a public proof is in fact invalid.
|
|
I want to explain briefly how you could check this claim.
|
|
The key in Wright's <a href="http://www.drcraigwright.net/jean-paul-sartre-signing-significance/">post</a> is this:</p>
|
|
<div class="highlight"><pre><code class="language-" data-lang="">------------------------- Signature File -------------------------
|
|
MEUCIQDBKn1Uly8m0UyzETObUSL4wYdBfd4ejvtoQfVcNCIK4AIgZmMsXNQWHvo6KDd2Tu6euEl1
|
|
3VTC3ihl6XUlhcU+fM4=
|
|
------------------------- End Signature --------------------------
|
|
</code></pre></div>
|
|
<p>Now we can use some bash utilities:</p>
|
|
|
|
<ul>
|
|
<li>base64, that translates encoded ASCII text;</li>
|
|
<li>hexdump, that displays hexadecimal contents from the input;</li>
|
|
<li>cut, used to remove the binary part of the input;</li>
|
|
<li>tr, used to delete spaces and carriage return from the input;</li>
|
|
</ul>
|
|
<div class="highlight"><pre><code class="language-" data-lang="">base64 -d <<<'MEUCIQDBKn1Uly8m0UyzETObUSL4wYdBfd4ejvtoQfVcNCIK4AIgZmMsXNQWHvo6KDd2Tu6euEl13VTC3ihl6XUlhcU+fM4=' | hexdump -C| cut -b 11-60| tr -d ' \n'
|
|
|
|
3045022100c12a7d54972f26d14cb311339b5122f8c187417dde1e8efb6841f55c34220ae0022066632c5cd4161efa3a2837764eee9eb84975dd54c2de2865e9752585c53e7cce
|
|
</code></pre></div>
|
|
<p>Let's analyze the command one by one:</p>
|
|
|
|
<ul>
|
|
<li><code>base64 -d</code> decodes the redirected string, the output is some gibberish characters so I won't display them here;</li>
|
|
<li><code>hexdump -C</code> is used with a pipe to convert to hexadecimal:</li>
|
|
</ul>
|
|
<div class="highlight"><pre><code class="language-" data-lang="">00000000 30 45 02 21 00 c1 2a 7d 54 97 2f 26 d1 4c b3 11 |0E.!..*}T./&.L..|
|
|
00000010 33 9b 51 22 f8 c1 87 41 7d de 1e 8e fb 68 41 f5 |3.Q"...A}....hA.|
|
|
00000020 5c 34 22 0a e0 02 20 66 63 2c 5c d4 16 1e fa 3a |\4"... fc,\....:|
|
|
00000030 28 37 76 4e ee 9e b8 49 75 dd 54 c2 de 28 65 e9 |(7vN...Iu.T..(e.|
|
|
00000040 75 25 85 c5 3e 7c ce |u%..>|.|
|
|
</code></pre></div>
|
|
<ul>
|
|
<li>cut -b 11-60 displays only the characters from column 11 to 60:</li>
|
|
</ul>
|
|
<div class="highlight"><pre><code class="language-" data-lang="">30 45 02 21 00 c1 2a 7d 54 97 2f 26 d1 4c b3 11
|
|
33 9b 51 22 f8 c1 87 41 7d de 1e 8e fb 68 41 f5
|
|
5c 34 22 0a e0 02 20 66 63 2c 5c d4 16 1e fa 3a
|
|
28 37 76 4e ee 9e b8 49 75 dd 54 c2 de 28 65 e9
|
|
75 25 85 c5 3e 7c ce
|
|
</code></pre></div>
|
|
<ul>
|
|
<li><code>tr -d ' \n'</code> is used to delete spaces and carriage returns from the output so that is shown in one line and it gives us the final result:</li>
|
|
</ul>
|
|
<div class="highlight"><pre><code class="language-" data-lang="">3045022100c12a7d54972f26d14cb311339b5122f8c187417dde1e8efb6841f55c34220ae0022066632c5cd4161efa3a2837764eee9eb84975dd54c2de2865e9752585c53e7cce
|
|
</code></pre></div>
|
|
<p>If you noticed, there is also another cleartext string at the beginning of Wright's post:</p>
|
|
<div class="highlight"><pre><code class="language-" data-lang="">$ base64 -d <<<'IFdyaWdodCwgaXQgaXMgbm90IHRoZSBzYW1lIGFzIGlmIEkgc2lnbiBDcmFpZyBXcmlnaHQsIFNhdG9zaGkuCgo='
|
|
Wright, it is not the same as if I sign Craig Wright, Satoshi.
|
|
</code></pre></div>
|
|
<p>Now let's head to blockchain.info.
|
|
Blockchain.info has a little <a href="https://blockchain.info/decode-tx">utility</a> to get hexadecimal informations out of a transaction on the blockchain, so let's use it to get the related info about this transaction:</p>
|
|
|
|
<p><a href="https://blockchain.info/tx/828ef3b079f9c23829c56fe86e85b4a69d9e06e5b54ea597eef5fb3ffef509fe">tx/828ef3b079f9c23829c56fe86e85b4a69d9e06e5b54ea597eef5fb3ffef509fe</a>
|
|
<a href="https://blockchain.info/tx/828ef3b079f9c23829c56fe86e85b4a69d9e06e5b54ea597eef5fb3ffef509fe?format=hex">tx/828ef3b079f9... in hexadecimal</a></p>
|
|
|
|
<p>As you can see the entire output of the first bash command, that is
|
|
<code>
|
|
3045022100c12a7d54972f26d14cb311339b5122f8c187417dde1e8efb6841f55c34220ae0022066632c5cd4161efa3a2837764eee9eb84975dd54c2de2865e9752585c53e7cce
|
|
</code>
|
|
is contained in:
|
|
<code>
|
|
"script":"483045022100c12a7d54972f26d14cb311339b5122f8c187417dde1e8efb6841f55c34220ae0022066632c5cd4161efa3a2837764eee9eb84975dd54c2de2865e9752585c53e7cce01"
|
|
</code>
|
|
except for the 48 at the beginning and the 01 at the end.</p>
|
|
|
|
<p>That is a signature hash:
|
|
this <a href="https://en.bitcoin.it/wiki/List_of_address_prefixes">page</a> explains that the 48 is just a decimal prefix given to uncompressed transactions, and the 01 at the end is just a SIGHASH_ALL <a href="https://bitcoin.org/en/glossary/signature-hash">code</a> that flags the end of the signature.</p>
|
|
|
|
<h2 id="so-is-it-a-fake">So, is it a fake?</h2>
|
|
|
|
<p>Yes, indeed.
|
|
At the end, I ask, why would you choose anything else than the easiest and most conclusive way to prove something?</p>
|
|
|
|
<p><img src="/wp-content/uploads/2016/satosh.jpg" alt="Wright "signs" the blockchain"></p>
|
|
|
|
</div>
|
|
|
|
<div class="related">
|
|
<h2>Related Posts</h2>
|
|
<ul class="related-posts">
|
|
|
|
<li>
|
|
<h3>
|
|
<a href="/pescewanda/2016/07/07/pres-berk/">
|
|
A short talk about cryptography at the Berkman Klein Center
|
|
<small>07 Jul 2016</small>
|
|
</a>
|
|
</h3>
|
|
</li>
|
|
|
|
<li>
|
|
<h3>
|
|
<a href="/pescewanda/2016/07/06/IM-services/">
|
|
Phone messaging apps comparison
|
|
<small>06 Jul 2016</small>
|
|
</a>
|
|
</h3>
|
|
</li>
|
|
|
|
<li>
|
|
<h3>
|
|
<a href="/pescewanda/2016/07/05/arduino_keyboard/">
|
|
Arduino Uno as HID keyboard
|
|
<small>05 Jul 2016</small>
|
|
</a>
|
|
</h3>
|
|
</li>
|
|
|
|
</ul>
|
|
</div>
|
|
|
|
</div>
|
|
|
|
</body>
|
|
</html>
|