<p>The ITI Audit Trail and Node Authentication (ATNA) Profile establishes the characteristics of a Basic Secure Node: </p><ol> <li> It describes the security environment (user identification, authentication, authorization, access control, etc.) assumed for the node so that security reviewers may decide whether this matches their environments. </li> <li>It defines basic security requirements for the communications of the node using TLS or equivalent functionality. </li> <li>It defines basic auditing requirements for the node </li> </ol> <p>The profile also establishes the characteristics of the communication of audit messages between the Basic Secure Nodes and Audit Repository nodes that collect audit information. </p> <p>This profile is based upon the Basic Security Profile written by the IHE Radiology committee, and has been extended to incorporate options that are needed by other disciplines. It incorporates a transition strategy so that implementations based on the older IHE Technical Framework will operate properly in this new profile.</p>