ORAN-DEFEND: Subspace Detection and Sanitization of Backdoor DRL xApps in Open RAN

Md Raihan Uddin, Fatemeh Lotfi, Tolunay Seyfi +1

Open Radio Access Networks (O-RAN) increasingly delegate near-real-time control to deep reinforcement learning (DRL) xApps obtained from third-party vendors, creating a new supply-…