The electronic health record (EHR) promises a decrease of costs as well as better service quality for patients. Unfortunatly, with this planned centralized storage arise security issues, exemplarily privacy related-problems. As the special subset of medical data, the emergency data, has to be available just-in-time, complex authentication purposes occur. Our approach PIPE (Pseudonymization of Information for Privacy in e-Health) guarantees security for the sensible patient’s medical data by applying authentication soley based on encryption. Furthermore, we provide a novel ad-hoc authentication mechanism for emergency data, which is based on the notion of pseudonyms.