In current years, automobiles became able to establish connections with other vehicles and substructure units that are located in the roadside. In the near future, the vehicular network will be extended to include the communication between vehicles and any smart devices in the roadside which is called Vehicle-toEverything (V2X) communication. The vehicular network causes many challenges due to varied nodes, various speeds and intermittent connection, where traditional security methods are not always efficacious. As a result, an extensive variety of research works has been done on optimizing security solutions whilst considering network necessities. In this paper, we present a comprehensive survey and taxonomy of the existing security solutions for V2X communication technology. Then, we provide discussions and comparisons with regard to some pertinent criteria. Also, we present a threat analysis for V2X enabling technologies. Finally, we point out the research challenges and some future directions.
Key words: V2X communications ,LTE ,Cyber security ,Vehicular network
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