A construction of universal secure network coding

TL;DR

This paper presents a universal secure network coding scheme that adapts to changing eavesdropper links, ensuring small mutual information leakage with minimal modifications at the source.

Contribution

It introduces a flexible, universal construction that works with any linear intermediate coding and relaxes security to allow dynamic eavesdropping scenarios.

Findings

Works with any linear coding at intermediate nodes

Allows eavesdropper links to change over time

Ensures mutual information is sufficiently small

Abstract

We construct a universal secure network coding. Our construction just modifies the transmission scheme at the source node and works with every linear coding at an intermediate node. We relax the security criterion such that the mutual information between the message and the eavesdropped signal is sufficiently small instead of strictly zero. Our construction allows the set of eavesdropped links to change at each time slot.