Europe is facing unprecedented challenges, such as the health, migration, economic, climate, energy, and political crises, leading to a sharp increase in emergency public spending and relaxation of due diligence checks. This has resulted in a rise in corruption and fraudulent activities, which have significant negative impacts on the European economy, society, environment, and democracy. Despite emerging technology’s potential to become a powerful tool in the fight against corruption and fraud, the public sector has been slow to adopt digitalization, resulting in data NOT being shared, harmonized, or properly analysed, making evidence-based decision-making almost impossible. Governments are slowly adopting new approaches to ensure a more data-driven, transparent, and accountable public governance, but several fundamental data-related issues remain unresolved. With a team of 9 excellent research institutions and universities, 12 technology, business, and standards, developing companies, 7 public end users, and 3 domain-relevant, industry-exposed NGOs, CEDAR will: (1) Identify, collect, fuse, harmonise, and protect complex data sources to generate and share 10+ high-quality, high-value datasets relevant for a more transparent and accountable public governance in Europe. (2) Develop interoperable and secure connectors and APIs to utilise and enrich 6+ Common European Data Spaces. (3) Develop innovative and scalable technologies for effective big data management and Machine Learning (ML) operations. (4) Deliver robust big data analytics and ML to facilitate human-centric and evidence-based decision-making in public administration. (4) Validate the new datasets and technologies (TRL5) in the context of fighting corruption, thus aligning with the EU strategic priorities: digitalisation, economy, democracy. (5) Actively promote results across Europe to ensure their adoption and longevity, and to generate positive, direct, tangible, and immediate impacts.