title: SecurityException: Bad applet class name after upgrade to JRE 1.7.0_13
body: <p>After upgrading to JRE 1.7.0_13 my Applet is not running anymore. I get the following Security Exception:</p>
  
  <pre><code>basic: Fortschritts-Listener hinzugefügt: sun.plugin.util.ProgressMonitorAdapter@25a091
  basic: Ausnahme: Bad applet class name.
  ExitException[ 3]java.lang.SecurityException: Bad applet class name
      at sun.plugin2.applet.Plugin2Manager.initAppletAdapter(Unknown Source)
      at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
      at java.lang.Thread.run(Unknown Source)
  basic: Fortschritts-Listener entfernt: sun.plugin.util.ProgressMonitorAdapter@25a091
  </code></pre>
  
  <p>The tricky thing is the applet is not loaded from the webserver but installed in JRE lib/ext directory.</p>
  
  <p>I think 'Bad applet class name' has been introduced with _013 because I don't find any information about it. The message does not give me any hint about what to change. </p>
  
  <p>Below is the embedding of the applet in the Web page.</p>
  
  <pre><code>&lt;embed table="some param" anzahl="506" 
      type="application/x-java-applet" 
      code="ArtefakteApplet.class" 
      name="artefakteApplet" 
      id="artefakteApplet" 
      height="550" width="1020"&gt;
  </code></pre>
  
  <p>Anybody an idea what to do?</p>