title: Encryption Transformer in Mule
body: <p>Please can anyone help me with encryption namespace and schema location in Mule 3.4.</p>
  
  <p>I have this Configuration XML</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  
  &lt;mule xmlns="http://www.mulesoft.org/schema/mule/core" xmlns:doc="http://www.mulesoft.org/schema/mule/documentation" xmlns:spring="http://www.springframework.org/schema/beans" version="EE-3.4.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-current.xsd
  http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd"&gt;
  
  
  &lt;encryption:config name="Encryption_PGP" defaultEncrypter="PGP_ENCRYPTER" doc:name="Encryption_PGP"&gt;
          &lt;encryption:pgp-encrypter-config publicKeyRingFileName="./mule.gpg" secretKeyRingFileName="./secring.gpg" secretAliasId="3879972755627455806" secretPassphrase="mule1234" principal="test1"/&gt;
  &lt;/encryption:config&gt;
  &lt;flow name="sdsd"&gt;
  
  &lt;encryption:encrypt config-ref="Encryption_PGP" doc:name="Encryption" using="PGP_ENCRYPTER" input-ref="#[message.payload]"&gt;
          &lt;encryption:pgp-encrypter principal="fernando.martinez &amp;lt;fernando.martinez@mulesoft.com&amp;gt;" /&gt;
  &lt;/encryption:encrypt&gt;
  &lt;/flow&gt;
  &lt;/mule&gt;
  </code></pre>
  
  <p>But its giving me this error: The prefix "encryption" for element "encryption:config" is not bound.</p>