# Security of 5G-V2X: Technologies, Standardization and Research Directions

## TL;DR

This paper reviews 5G-V2X security, compares it with LTE-V2X, proposes a novel SRF-based security architecture, and discusses research challenges and requirements for ultra-dense, ultra-secure vehicular communications.

## Contribution

It introduces a new SRF-based security architecture for 5G-V2X and highlights specific research challenges and requirements for secure, high-density vehicular networks.

## Key findings

- 5G-V2X offers improved security over LTE-V2X.
- The proposed SRF-based architecture enhances vehicular security.
- Identifies key research challenges for ultra-dense, secure V2X communications.

## Abstract

Cellular-Vehicle to Everything (C-V2X) aims at resolving issues pertaining to the traditional usability of Vehicle to Infrastructure (V2I) and Vehicle to Vehicle (V2V) networking. Specifically, C-V2X lowers the number of entities involved in vehicular communications and allows the inclusion of cellular-security solutions to be applied to V2X. For this, the evolvement of LTE-V2X is revolutionary, but it fails to handle the demands of high throughput, ultra-high reliability, and ultra-low latency alongside its security mechanisms. To counter this, 5G-V2X is considered as an integral solution, which not only resolves the issues related to LTE-V2X but also provides a function-based network setup. Several reports have been given for the security of 5G, but none of them primarily focuses on the security of 5G-V2X. This article provides a detailed overview of 5G-V2X with a security-based comparison to LTE-V2X. A novel Security Reflex Function (SRF)-based architecture is proposed and several research challenges are presented related to the security of 5G-V2X. Furthermore, the article lays out requirements of Ultra-Dense and Ultra-Secure (UD-US) transmissions necessary for 5G-V2X.