On KLJN-based secure key distribution in vehicular communication networks

TL;DR

This paper proposes a lane-by-lane KLJN-based secure key distribution method for vehicular networks, utilizing roadside equipment and analyzing key lifetime based on vehicle density.

Contribution

It introduces a novel roadside KLJN key donation approach for vehicles and provides a method to estimate key lifetime considering car density.

Findings

Lane-by-lane KLJN key donation is feasible in vehicular networks.

Key lifetime depends on vehicle density and can be estimated.

Enhanced security for vehicular communication systems.

Abstract

In a former paper [Fluct. Noise Lett., 13 (2014) 1450020] we introduced a vehicular communication system with unconditionally secure key exchange based on the Kirchhoff-Law-Johnson-Noise (KLJN) key distribution scheme. In this paper, we address the secure KLJN key donation to vehicles. This KLJN key donation solution is performed lane-by-lane by using roadside key provider equipment embedded in the pavement. A method to compute the lifetime of the KLJN key is also given. This key lifetime depends on the car density and gives an upper limit of the lifetime of the KLJN key for vehicular communication networks.