Encriptar iframe

<div id="juego"><iframe frameborder="0" height="470" scrolling="no" src="<?php $values = get_post_custom_values("game"); echo $values[0]; ?>" width="710"></iframe></div>

<div id="juego"><iframe frameborder="0" height="470" scrolling="no" src="urldeljuego.swf" width="710"></iframe></div>

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