arxivcs.CRcs.AIcs.LG2026-07-16
FLINT: Fingerprinting Federated Learning Architectures from 5G PHY-Layer Side Channels
Md Nahid Hasan Shuvo, Mahmudul Hassan Ashik, Moinul Hossain
Federated Learning (FL) over 5G cellular networks protects raw data but remains vulnerable to side-channel leakage. Prior fingerprinting attacks assume packet-level network visibility, an assumption that does not hold at the 5G Physical (PHY) layer, where user payloads are encryp…