Implementation of Automotive Cybersecurity Assurance Level

This paper explores the implementation of ISO-21434 Automotive Cybersecurity Assurance Levels (CAL), focusing on enhancing component level cybersecurity for a vehicle. CAL values, which range from 1 to 4, provide a metric for ensuring that assets are protected against relevant threats at various phases of the Software Development Life Cycle (SDLC). By identifying potential attack vectors and their severity early in the SDLC, specifically during the Concept phase of ISO 21434, organizations can determine the CAL values. The CAL value serves as a benchmark to determine the level of severity required during the design, development, and verification phases of the SDLC. This paper outlines a method to establish CAL values as per ISO-21434 guidelines. The proposed methodology includes a detailed analysis of threat modeling, which is crucial for identifying and mitigating potential cybersecurity risks. By conducting threat modeling, organizations can systematically assess vulnerabilities and implement appropriate countermeasures to enhance the security posture of automotive components. Furthermore, the paper discusses the integration of CAL into an existing cybersecurity framework, emphasizing the importance of continuous monitoring and improvement. The case study demonstrates how CAL values can be effectively utilized to prioritize cybersecurity efforts and allocate resources efficiently. Additionally, we append different cases to determine the correct CAL value based on test results, ensuring comprehensive validation and robustness of the cybersecurity measures. By incorporating CAL into the SDLC, organizations can ensure that cybersecurity considerations are embedded throughout the development process, from initial concept to final deployment. This comprehensive approach not only enhances the security of automotive components but also contributes to the overall resilience of the vehicle against cyber threats.