Sovereign Data Exchange in Cloud-Connected IoT using International Data Spaces

Data sovereignty is gaining increasing importance as the frequency and sensitivity of data exchange between companies and nations increase. Existing approaches ensuring sovereign data exchange in business ecosystems, like the International Data Spaces (IDS) initiative, neglect limitations of hardware resource restrictions. Therefore, we examine real-time sovereign data exchange in cloud-connected Internet of Things (IoT) devices. Two lightweight communication schemes based on request/response and publish/subscribe are proposed and implemented following the IDS guidelines. For evaluation, we use a simulated test-bed based on an Automated Guided Vehicle (AGV) use case. We examine the results based on exchanged IDS messages and CPU usage on the consumer side represented by the AGVs as IoT devices. Results show benefits in the publish/subscribe version in longer operation times, allowing to enter low-power mode, while request/response performs better on limited CPU resources or short operations.