The Security State of the German Health Web: An Exploratory Study

The internet has become an important resource for health information and for interactions with healthcare providers. However, information of all types can go through many servers and networks before reaching its intended destination and any of these has the potential to intercept or even manipulate the exchanged information if data's transfer is not adequately protected. As trust is a fundamental concept in healthcare relationships, it is crucial to offer a secure medical website to maintain the same level of trust as provided in a face-to-face meeting. This study provides a first analysis of the SSL/TLS security of and the security headers used within the health-related web limited to web pages in German, the German health web (GHW).

testssl.sh and TLS-Scanner were used to analyze the URLs of the 1,000 top-ranked health-related web sites (according to PageRank) for each of the country- code top level domains: ".de", ".at" and ".ch".

Our study revealed that most websites in the GHW are potentially vulnerable to common SSL/TLS security vulnerabilities, offer deprecated SSL/TLS protocol versions and mostly do not implement HTTP security headers at all.

These findings question the concept of trust within the GHW. Website owners should reconsider the use of outdated SSL/TLS protocol versions for compatibility reasons. Additionally, HTTP security headers should be implemented more consequently to provide additional security aspects. In future work, the authors intend to repeat this study and to incorporate a website's category, i.e. governmental or public health, to get a more detailed view of the GHW's security.