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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Shamir Secret Sharing Scheme</title>
<link rel="stylesheet" href="css/bootstrap.css">
<link rel="stylesheet" href="css/app.css">
<meta content="Shamir Secret Sharing Scheme tool" name="description"/>
<meta content="width=device-width, initial-scale=1.0" name="viewport" />
<meta content="Ian Coleman" name="author" />
</head>
<body>
<div class="container">
<div class="row">
<div class="col-sm-12">
<h1>Shamir Secret Sharing Scheme</h1>
<p>Split your secret into parts which can be combined back into the original secret using some or all of the parts.</p>
</div>
</div>
<div class="row">
<div class="col-sm-6">
<h2>Split</h2>
<div>
Require
<input class="required form-control" type="number" value="3" min="2" max="255">
parts from
<input class="total form-control" type="number" value="5" min="2" max="255">
to reconstruct the following secret
</div>
<textarea class="secret form-control" rows=10 placeholder="Enter your secret here"></textarea>
<h2>Usage</h2>
<p>Double click each part below to select the content for that part. Copy and paste the content for each part into <span class="distributesize">5</span> individual files on your computer.</p>
<p>Distribute one file to each person in your group.</p>
<p>If <span class="recreatesize">3</span> of those people can combine the contents of their file using this page, they can view the secret.</p>
<p>Remember to delete the parts from your computer once you're finished. If you use a rubbish bin for deleted files, also remove them from the rubbish bin.</p>
<p class="error text-danger"></p>
<h2>Parts</h2>
<ol class="generated">
<li>Enter your secret above.</li>
</ol>
</div>
<div class="col-sm-6">
<h2>Combine</h2>
<p class="form-control-static">
Enter the secrets, one per line
</p>
<textarea class="parts form-control" rows=10></textarea>
<h2>Result</h2>
<pre class="combined">Enter your parts above.</pre>
</div>
</div>
<hr>
<div class="row">
<div class="col-sm-12">
<div class="sources">
<h2>Sources</h2>
<p><a href="https://en.wikipedia.org/wiki/Shamir%27s_Secret_Sharing">Wikipedia entry</a> for shamir secret sharing scheme.</p>
<p>This project is 100% open-source code.</p>
<p><a href="https://github.com/iancoleman/shamir">Project source code</a></p>
<p><a href="https://github.com/amper5and/secrets.js">SSSS javascript library by amper5and</a></p>
<p><a href="https://getbootstrap.com/">Bootstrap stylesheet</a></p>
<h2>Offline Usage</h2>
<p>This tool has been designed to be used offline.</p>
<p>In your browser, select file save-as, and save this page as a file.</p>
<p>Double-click that file to open it in a browser on any offline computer.</p>
</div>
</div>
</div>
</div>
<script src="js/secrets.js"></script>
<script src="js/selector.js"></script>
<script src="js/app.js"></script>
</body>
</html>