Privacy-Preserving Federated Fraud Detection in Payment Transactions with NVIDIA FLARE. - Holger R. Roth; Sarthak Tickoo; Mayank Kumar; Isaac Yang; Andrew Liu; Amit Varshney; Sayani Kundu; Iustina Vintila; Peter Madsgaard; Juraj Milcak; Chester Chen; Yan Cheng; et al. (CoRR, 2026)