eprint.iacr.orgpaper

Post-Quantum Dropout-Resilient Verifiable Secure Aggregation for Federated Learning

PQ-DVSA is a verifiable secure aggregation protocol for federated learning that combines post-quantum cryptography, resilience to client dropouts, and verifiability of the server's aggregation result under bounded server-client collusion. It protects both clients' local model updates and their aggregation weights, lets the server reconstruct the aggregate mask for the active client set after dropouts, and lets clients cryptographically check the aggregation result. Experiments show learning accuracy comparable to exact weighted aggregation while cutting per-client encrypted-submission runtime by up to 96% versus SWAS, the closest prior scheme.