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In a global sales market with networked production steps and increasing complex machine tools, scaling service ecosystems for production provide an adequate solution for handling the generated data. The existing sensor equipment at current and the extension possibility by the System-of-Systems approach for existing machine tools can offer value-added services by the smart handling of production-related data. It is important to make these data validatable and exchangeable, taking into account to different protection goals. The trust of the individual actors in such a volatile value chain and the different (partly cross-border) value creation partners play an important role. The participation of a large number of these actors creates an attractive overall system (ecosystem) with lots of services and network effects. Concerning data security there are numerous aspects, which have not been adequately answered or taken into account in the use of a service ecosystem in the production environment. The paper discusses a distributed ecosystem for production on a distributed ledger-based service ecosystem, in which services can be mapped in the machine tool environment (e.g. calibration). This technology can be used for secure data exchange in order to discuss traceability and unchangeability of data while maintaining data sovereignty.

Public displays serve as an ubiquitous source of information in public space. In context of public transport information systems, they commonly advice impersonal departure and arrival timetables. Since most displayed information is very generic, users often have problems to find the specific information they need. We propose an approach for context-aware public displays to improve personalized information access according to a user's language, location, time or other individual preferences. In our research we analyze how users access information concerning their personal trips in the field of public transport. We carried out a user survey to examine the requirements for adapted content on public displays, in preparation for a quantitative user study with focus on the visualization of specific content.