Complexity: Low
Help Desk Ticket Reference: https://c.na7.visual.force.com/apex/Case_View?id=500A0000008UO8NIAW&sfdc.override=1
project_key: SOA

It is not possible to use an encrypted FTP password within the FTP adapter (The password is in plaintext).
It should be possible to encryt the password!
See the plaintext password within this extract from an esb file : esbcontent/META-INF/jboss-esb.xml

<ftp-provider name="FTPprovider" hostname="192.168.122.22" >
<ftp-bus busid="helloFTPChannel" >
<ftp-message-filter
  username="ftp_esb"
  password="ftp_esb"
  passive="false"
  directory="ftp_dir"
  input-suffix=".dat"
  work-suffix=".esbWorking"
  post-delete="false"
  post-rename="true"
  post-suffix=".COMPLETE"
  protocol="ftp"
  error-delete="false"
  error-suffix=".HAS_ERROR"
/>
</ftp-bus>
</ftp-provider>