Aerial IRS Deployment-Aided Secure Computation Offloading Against DISCO Jamming Attacks

TL;DR

This paper introduces an aerial intelligent reflective surface (AIRS) to enhance secure computation offloading in MEC systems under DISCO jamming attacks, using a two-timescale DRL-based optimization framework.

Contribution

It proposes a novel AIRS deployment and optimization framework with a dual-agent DRL scheme to counter DISCO jamming in MEC offloading.

Findings

AIRS deployment significantly improves offloading performance against jamming.

The DDADSO scheme outperforms benchmark schemes in simulations.

Two-timescale optimization effectively adapts to dynamic channel conditions.

Abstract

With the rapid growth of Multi-access Edge Computing (MEC), secure and efficient computation offloading from user equipment (UEs) to edge access points (APs) is critical. However, DISCO intelligent reflective surface-based fully-passive jammers (DIRS-based FPJs) use random time-varying phase shifts to launch DISCO jamming attacks, disrupting offloading performance. This paper leverages an aerial intelligent reflective surface (AIRS) to enable secure computation offloading against DISCO jamming by jointly optimizing offloading ratios, AIRS phase shifts, and deployment. A two-timescale (2Ts) framework is proposed to address the optimization challenge caused by the distinct update frequencies of different strategies. Specifically, AIRS deployment is adjusted on a long timescale to boost antijamming capability due to the impracticality of frequent physical adjustment, while offloading ratios and phase shifts are optimized on a short timescale to adapt to DIRS-jammed dynamic channel conditions. We propose a dual-agent deep reinforcement learning (DRL)-based AIRS deployment-aided secure computation offloading (DDADSO) scheme to maximize the secure offloading utility under DISCO jamming. Simulation results verify that the proposed DDADSO scheme outperforms benchmark schemes, demonstrating the effectiveness of AIRS deployment in improving offloading performance against DISCO jamming attacks.