Encryption call

Response
<encrypt xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/com.empowry.lwm.analytics.App">

  <eval>ENCRYPTEDSTRING</eval> 

Decryption call
Response
<decrypt xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/com.empowry.lwm.analytics.App">

  <eval>03121975</eval>