Non-Reciprocity Compensation Combined with Turbo Codes for Secret Key Generation in Vehicular Ad Hoc Social IoT Networks

TL;DR

This paper introduces a novel method combining non-reciprocity compensation with turbo codes to enhance secret key generation in vehicular social IoT networks, addressing channel noise and hardware impairments.

Contribution

It is the first to incorporate 3D scattering and scatterer mobility into key generation by combining non-reciprocity compensation with turbo codes.

Findings

Turbo codes significantly reduce bit mismatch rate.

Turbo codes improve key generation rate.

Method outperforms sample indexing techniques.

Abstract

The physical attributes of the dynamic vehicle-to-vehicle (V2V) propagation channel can be utilised for the generation of highly random and symmetric cryptographic keys. However, in a physical-layer key agreement scheme, non-reciprocity due to inherent channel noise and hardware impairments can propagate bit disagreements. This has to be addressed prior to the symmetric key generation which is inherently important in social Internet of Things (IoT) networks, including in adversarial settings (e.g. battlefields). In this paper, we parametrically incorporate temporal variability attributes, such as three-dimensional (3D) scattering and scatterers mobility. Accordingly, this is the first work to incorporate such features into the key generation process by combining non-reciprocity compensation with turbo codes. Preliminary results indicate a significant improvement when using Turbo Codes in bit mismatch rate (BMR) and key generation rate (KGR) in comparison to sample indexing techniques.