The TreuMoDa project set out to design a legally compliant trustee for mobility data, focusing on the anonymization and pseudonymization of personal information and on facilitating transparent data exchange. The Karlsruhe Institute of Technology (KIT) led three core work packages and contributed to additional tasks, while the Fraunhofer Institute for Industrial Engineering (FZI) supplied technical methods that were integrated into the platform mock‑ups. Funding came from the German Federal Ministry of Education and Research under grant numbers 16DTM112A, 16DTM112B and 16DTM112C, and the project ran over a three‑year period.

In the first work package, KIT gathered stakeholder requirements through questionnaires and workshops. The analysis revealed a need for a shared data pool, clear responsibilities for the trustee, and mechanisms to inform and advise data providers. From this, a business model for the trustee was drafted and a SWOT analysis identified strengths such as legal alignment, weaknesses like limited existing infrastructure, opportunities in emerging mobility services, and risks related to data protection compliance. The package also produced a financing concept that compares realistic and optimistic scenarios, with a model calculation illustrating expected costs and revenue streams for the trustee.

The second work package delivered a technical concept for data storage and exchange. An abstract architecture of the TreuMoDa platform was defined, showing modular components for data ingestion, anonymization, pseudonymization, and secure storage. A BPMN diagram of a sample anonymization process demonstrates how raw mobility traces are transformed into privacy‑preserving datasets. Mock‑ups created in Balsamiq illustrate user interfaces for data providers and researchers, including controls for anonymization levels and metadata management. The team evaluated the metadata requirements through pilot testing, revealing that a minimal set of contextual attributes is sufficient for most research use cases while preserving privacy. Integration of FZI‑developed anonymization algorithms into the mock‑ups was also demonstrated, and a prototype for trace‑based data anonymization was presented, showing that the system can handle high‑volume, time‑stamped mobility logs with acceptable latency.

The third work package focused on the organizational design of the trustee. It outlined governance structures, roles and responsibilities, and procedures for data access requests. The design ensures that the trustee operates transparently, with clear audit trails and compliance checks. The package also defined service level agreements for data providers and researchers, and established a framework for continuous improvement based on stakeholder feedback.

Across all work packages, the project produced a comprehensive set of deliverables: a detailed business model, a financing concept, a technical architecture, process models, user interface mock‑ups, and a governance framework. These outputs provide a ready blueprint for implementing a mobility data trustee that meets current legal requirements and supports fair, transparent data exchange. The collaboration between KIT, FZI, and other partners under the BMBF grant has yielded a robust, technically sound, and legally defensible platform concept that can be adopted by data holders and researchers to unlock the value of mobility data while safeguarding privacy.