The advent of digitization in the health sector is making great strides as it greatly simplifies the administration and management.
Furthermore the digitization will help in this way to subsequently cut costs. Digitization however brings not only advantages but also puts the issue of the patient's privacy in a new light. Being accessed via computer networks, digital patient records increases the risk of abuse or of unauthorized access drastically.
This thesis deals with the doctor's letter based upon Health Level Seven (HL7). The doctor's letter is used to exchange patient information between various health care providers or by research. We analyze the data of a discharge letter and classify them according to their confidentiality.
Based on this classification the concept of PIPE (Pseudonymization of Information for Privacy in e-Health) will be extended to allow an application of this service on HL7 documents. For this reason, new procedures are defined and the data structures are extended to meet these new requirements.
With the help of this thesis, a guideline for future developments in the field of health care arises to ensure secure storage and secure exchange of documents based on HL7. Furthermore this concept prevents unauthorized access to sensitive data and it preserves the patient's privacy.