الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Internet of Things (IoT) in Fifth Generation (5G) communication network allows many applications, such as self-driving cars, remote surgery, flying drones, and security. Every device and user in such communication environment uses the internet to communicate. As a result, there will be various security and privacy issues in this communication. Additionally, it is prone to several attacks such as eavesdropping, denial of service, and man-in-the-middle. So, it is very important to keep the infrastructure of IoT in 5G communication network protected against these attacks.Due to the facilities that Internet of Vehicles (IoV) offers to modern transportation systems, it is an important application for Internet of Things. To connect sensors and vehicles on roads and to provide vehicles with all the communication services, fifth generation mobile communication systems serve as a platform. 5G-IoV communication has many opportunities, but this wide network has security and privacy issues that affect performance.This study provides an overview for 5G and its enabling technologies, the role of 5G in IoT and especially in IoV, the challenges in 5G-IoT network and possible countermeasures. A comprehensive simulation for Distributed Denial of Service (DDoS) attack in 5G-IoV network is introduced using OMNet++, INET, SIMU5G, VEINS and SUMO. It measures the performance of the network and analyses the results to show impact of the DDoS attack. A simple countermeasure based on setting a threshold for message length is implemented. The effectiveness of this countermeasure is shown in the results.