The word “TANIT” means “Telematics for ANaesthesia and Intensive Therapy”. The objective of the TANIT project is to develop information and telematic systems in critical care environments that are integrated in the hospital information space. The goal is to produce an integrated European reference computer for Critical Care Environments (CCE). For this purpose, TANIT is developing methods and guidelines for the design, implementation, introduction and evaluation of systems, successful patient data management, medical/nursing activities, clinical audit, and departmental management for Anaesthesia and Intensive Care. In this context, the task of Workpackage PROTEC -Data Protection, Security and Confidentiality- was to develop confidentiality rules for personal and management data which arise in a CCE context, and at the same time to establish procedures that will allow medical personnel all data access needed for successful treatment of their patients. Furthermore, PROTEC proposed technical methods to protect sensitive data in the computerized records.