Exploiting Physical-Layer Security for Multiuser Multicarrier Computation Offloading

TL;DR

This paper proposes a method to enhance physical-layer security in multiuser multicarrier MEC systems, optimizing energy and resource allocation to secure computation offloading against eavesdroppers.

Contribution

It introduces a joint optimization framework for secure computation offloading in MEC systems using physical-layer security techniques, with an efficient algorithm for resource allocation.

Findings

Minimized energy consumption while ensuring secrecy and latency constraints.

Developed an efficient algorithm for joint resource optimization.

Enhanced security of multiuser offloading against eavesdropping.

Abstract

This letter considers a mobile edge computing (MEC) system with one access point (AP) serving multiple users over a multicarrier channel, in the presence of a malicious eavesdropper. In this system, each user can execute the respective computation tasks by partitioning them into two parts, which are computed locally and offloaded to AP, respectively. We exploit the physical-layer security to secure the multiuser computation offloading from being overheard by the eavesdropper. Under this setup, we minimize the weighted sum-energy consumption for these users, subject to the newly imposed secrecy offloading rate constraints and the computation latency constraints, by jointly optimizing their computation and communication resource allocations. We propose an efficient algorithm to solve this problem.