The 6th TANGO General Assembly (GA) took place in Alcúdia, Mallorca, from May 5 to 7, 2025. The TANGO project, funded by the EU’s Horizon Europe programme, is now approaching its final phase, with key deliverables and reports due by the end of the summer 2025. During the meeting, project partners participated in on-site testing and evaluation of the Smart Hospitality Pilot and reviewed progress across all pilots and work packages. 

Technical Progress 

Significant progress has been made in defining over 100 user requirements, aligning with GAIA-X and IDSA standards, and integrating privacy and ethical assessments into the design process. Key deliverables – including a gap analysis, user scenarios, and a comprehensive privacy and legal impact assessment – have been completed. 

Privacy-Preserving Data Management 
The Trustworthiness Scoring Module and the Privacy Risk Scoring Module assess the degree to which an access request satisfies a predefined privacy policy. These components, in collaboration with the Trust and Identity Management modules, enhance the access control and the privacy of the data spaces. Encryption functionalities, as well as privacy-preserving mechanisms and recommendations, have been successfully tested and integrated into relevant pilots. A holistic framework (FIDES), enabling data sharing in heavily regulated environments, has been also delivered for the Public Administration use case. Several academic contributions have also emerged from this work. 

Trust and Identity Management 
Components in this block have been successfully integrated with an IDS compliant data space connector (following the latest Data Space Business Alliance specs) to offer an enhanced and trusted data-sharing environment. Policy components, such as the Policy Decision Point (PDP) and Policy Enforcement Point (PEP), interact with the rest of the elements to validate claims from the users against the defined policies for the different use cases. This is done in collaboration with a Self-Sovereign Identity (SSI) system (composed of an SSI Wallet and Agent to manage the users and devices identities and credentials), a user and device onboarding and continuous behavioral authentication solution, and hardware-level security measures, enabling secure and privacy-preserving data sharing. These components are currently being piloted in most of the project use cases, as the majority requires identification of users via onboarding the ePassport credentials of participants. 

AI-Driven Sustainability and Trust 
An AI-based framework focused on the sustainability of AI operations – using data shared via the TANGO platform – was completed and delivered in early 2025. It provided tools for data analysis, energy-efficient model training, hardware acceleration, privacy assurance, explainability in AI, and renewable energy scheduling optimization for AI training and other intensive operations in data centers. AI components are used in many of the pilots of the project to get insights of the data shared in a sustainable manner.

Platform Integration and User Interfaces
The Smart Hospitality pilot has seen full deployment, with other pilots in progress. A React-based reporting tool and responsive UI have been developed, enabling aspects such as the interaction, onboarding, authentication, and authorization to use the system, and the selection of components to be deployed for each use case, depending on the users’ needs and policies. Final integration and validation are ongoing to be optimized for the remaining use cases, with the final system version expected shortly. 

Pilot Demonstrations and Validation 

Pilot integration is actively progressing across all six pilots, with Smart Hospitality being the first to be evaluated. On the first day of the GA, participants experienced a hands-on demonstration of the pilot in a real-world environment – the venue itself is part of the Smart Hospitality use case. Tasks performed included a novel registration in the system, using the ePassport app, receiving a Verifiable Credential (VC) in a dedicated SSI wallet, and completing a mobile hotel check-in. This end-to-end test under real-life conditions was highly successful and highlighted the potential of the TANGO platform. Feedback is being collected across all pilots to refine system components and evaluate usability and impact. Evaluation methods include surveys and interviews, and final deliverables will summarize Pilot’s outcomes and takeaways. 

Communication, Dissemination, and Exploitation 

Beyond technical advancements, the GA also focused on communication and dissemination strategies for the final months of the project. A robust communication plan is in place, with 18 exploitable results identified – 9 of which are considered key. Business models and sustainability strategies are under development, both for individual exploitation and joint stakeholder engagement. Standardization efforts are ongoing, with active participation in relevant forums and training initiatives. 

The TANGO project is now taking its final steps toward delivering a secure, compliant, and forward-looking digital platform for trusted data exchange. With strong technical foundations, validated pilot implementations, and a focus on long-term sustainability and market readiness, TANGO is well-positioned for impactful post-project adoption.