Encryption
uCalling a web service via HTTPS encrypts the entire message during transit. uUse encryption for individual elements of the web service message itself. uWhen an intermediary server receives the message, the sensitive data in that message is still encrypted by other means.  uWS-Security protocol allows individual XML blocks in the SOAP message to be encrypted using different keys.  uAllows messages to be processed by multiple servers, with each server capable of accessing only the information that is intended for it.
uRemaining encrypted data will be unreadable.