CRAFT: Cold-Start Recommender with Attention and Federated Training
Sivakumar, N., John, R.S., Bijo, A. et al.
Published 14 Apr 2026 · DOI 10.1038/s41598-026-47175-5
Federated-learning recommender that tackles the cold-start problem without leaking user data. CRAFT uses an attention mechanism to highlight salient user-item interaction patterns and aggregates per-client updates via Federated Averaging (FedAvg), with NVFlare for distributed deployment. Across MovieLens 1M, Amazon Movies & TV, and CiteULike, CRAFT improves cold-start nDCG@20 by up to 16.8% over state-of-the-art federated baselines such as FedMF and FedGN while preserving privacy.










