Almost universal codes for fading wiretap channels

TL;DR

This paper introduces a universal lattice coding scheme that achieves strong secrecy and semantic security over fading wiretap channels, regardless of the specific fading model, with performance close to the secrecy capacity.

Contribution

It presents a novel sequence of non-random lattice codes that are nearly universal, achieving near-capacity secrecy over both Gaussian and ergodic fading channels.

Findings

Achieves strong secrecy and semantic security

Works universally over different fading models

Close to secrecy capacity with constant gap

Abstract

We consider a fading wiretap channel model where the transmitter has only statistical channel state information, and the legitimate receiver and eavesdropper have perfect channel state information. We propose a sequence of non-random lattice codes which achieve strong secrecy and semantic security over ergodic fading channels. The construction is almost universal in the sense that it achieves the same constant gap to secrecy capacity over Gaussian and ergodic fading models.