Initial Import
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+<td><h1>Code Igniter User Guide Version 1.4.0</h1></td>
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+<a href="http://www.codeigniter.com/">Code Igniter Home</a> ›
+<a href="../index.html">User Guide Home</a> ›
+Security
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+<td id="searchbox"><form method="get" action="http://www.google.com/search"><input type="hidden" name="as_sitesearch" id="as_sitesearch" value="www.codeigniter.com/user_guide/" />Search User Guide <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" /> <input type="submit" class="submit" name="sa" value="Go" /></form></td>
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+<div id="content">
+
+<h1>Security</h1>
+
+<p>This page describes some "best practices" regarding web security, and details
+Code Igniter's internal security features.</p>
+
+
+<h2>URI Security</h2>
+
+<p>Code Igniter is fairly restrictive regarding which characters it allows in your URI strings in order to help
+minimize the possibility that malicious data can be passed to your application. URIs may only contain the following:
+</p>
+
+<ul>
+<li>Alpha-numeric text</li>
+<li>Tilde: ~ </li>
+<li>Period: .</li>
+<li>Colon: :</li>
+<li>Underscore: _</li>
+<li>Dash: -</li>
+</ul>
+
+<h2>GET, POST, and COOKIE Data</h2>
+
+<p>GET data is simply disallowed by Code Igniter since the system utilizes URI segments rather than traditional URL query strings (unless
+you have the query string option enabled in your config file). The global GET
+array is <strong>unset</strong> by the Input class during system initialization.</p>
+
+<h2>Register_globals</h2>
+
+<p>During system initialization all global variables are unset, except those found in the $_POST and $_COOKIE arrays. The unsetting
+routine is effectively the same as register_globals = off.</p>
+
+
+<h2>magic_quotes_runtime</h2>
+
+<p>The magic_quotes_runtime directive is turned off during system initialization so that you don't have to remove slashes when
+retrieving data from your database.</p>
+
+<h1><br />Best Practices</h1>
+
+<p>Before accepting any data into your application, whether it be POST data from a form submission, COOKIE data, URI data,
+XML-RPC data, or even data from the SERVER array, you are encouraged to practice this three step approach:</p>
+
+<ol>
+
+<li>Filter the data as if it were tainted.</li>
+<li>Validate the data to ensure it conforms to the correct type, length, size, etc. (sometimes this step can replace step one)</li>
+<li>Escape the data before submitting it into your database.</li>
+</ol>
+
+Code Igniter provides the following functions to assist in this process:</p>
+
+<ul>
+
+<li><h2>XSS Filtering</h2>
+
+<p>Code Igniter comes with a Cross Site Scripting filter. This filter looks for commonly
+used techniques to embed malicious Javascript into your data, or other types of code that attempt to hijack cookies
+or do other malicious things. The XSS Filter is described <a href="../libraries/input.html">here</a>.
+</p>
+</li>
+
+<li><h2>Validate the data</h2>
+
+<p>Code Igniter has a <a href="../libraries/validation.html">Validation Class</a> that assists you in validating, filtering, and prepping
+your data.</p>
+</li>
+
+<li><h2>Escape all data before database insertion</h2>
+
+<p>Never insert information into your database without escaping it. Please see the section that discusses
+<a href="../libraries/database/queries.html">queries</a> for more information.</p>
+
+</li>
+
+</ul>
+
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+
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