title: What is a security token and why is it used in forms?
body: <p>I have seen in many forums and other sites that they use a security token (a long string) in their POST or GET method. For example (POST Method):</p>
  
  <pre><code>&lt;input
      type="hidden"
      name="securitytoken"
      value="1363774829-89afb5d0fbcd2f8d55db0b675061d62bd21ca94e"
  /&gt;
  </code></pre>
  
  <p>GET method example:</p>
  
  <pre><code>http://www.example.com?attribute=xyz&amp;token=f0ec0e8e1622a030cbc543d3ac42729e
  </code></pre>
  
  <p>What is this security token? And why is it used? What type of security does it provide? Where should it be used?</p>