Enterprise User Authentication (EUA) - Defines a means to establish one name per user that can then be used on all of the devices and software that participate in this integration profile. It greatly facilitates centralized user authentication management and provides users with the convenience and speed of a single sign-on. This profile leverages Kerberos (RFC 1510) and the HL7 CCOW standard (user subject).  User authentication is a necessary step for most application and data access operations and it is a workflow improvement for the users.  Future profiles will deal with other security issues, such as authorization management