Which security level would typically involve high motivation and extensive resources for intentional violations?

In the context of the ISA/IEC 62443 framework, Security Levels (SL) are designed to categorize the necessary cybersecurity measures based on the potential threat and impact on the system. The levels range from SL-0 to SL-4, with each ascending level indicating an increasing standard of protection.

Choosing SL-4 indicates a scenario where high motivation and extensive resources are present for intentional violations. This security level addresses the highest degree of threat severity, which includes advanced persistent threats or highly skilled attackers who are likely to employ significant determination and resource investment to breach the system's defenses. Organizations classified under SL-4 are expected to implement a comprehensive set of security measures that can withstand these serious attacks. This involves not only technical safeguards but also processes, personnel training, and incident response capabilities tailored to mitigate the risks posed by attackers with extensive resources.

In contrast, lower security levels, such as SL-0, SL-1, and SL-2, are designed for environments facing less sophisticated threats or those that may not be as resource-intensive. These levels may encounter less motivated attackers or those with limited skills and resources, thus requiring less stringent defenses. Therefore, SL-4 effectively encapsulates the highest standards necessary to defend against highly motivated attackers equipped with significant