This volume constitutes revised selected papers from the workshops that took place in conjunction with the 30th International Conference on Financial Cryptography and Data Security, FC 2026, St. Kitts, St. Kitts and Nevis, March 2–6, 2026.

The 23 full papers and 8 short papers accepted were part of the 77 submitted papers, and are included under topical sections such as - Evaluation and Methodology, Applications of Synthetic Data, and Broader Perspectives and Impact.