Cyber Incident Classification 25 Statutory notification requirements can also provide more detail, with each requirement including a defined set of incident categories. RECOMMENDATION 8 A standard approach to categorizing and prioritizing cyber incidents in accordance with their severity and scale is important for diagnosing an incident and relating the importance of the incident to its impact on a specific institution, entity or sector and its urgency, relative to the timing of the incident. Categorization speeds up the process of incident classification and creates greater efficiency within the process flow while priority assignment can help ensure a common lexicon when an incident is being discussed, help determine urgency, incident response and reporting requirements, as well as recommendations for leadership engagement. Incident priority designation can help ensure a common lexicon when an incident is being discussed. It also helps determine urgency, incident response and reporting requirements, as well as recommendations for leadership engagement. Based on the material reviewed for this study, some States first categorize a cyber incident and then assign it priority, while some only attend to the first. Ideally, both should be covered. Other taxonomies developed by private entities can also be useful to consider when developing NCICS.6 6 See, for example, FIRST Metrics SIG; FIRST DNS Abuse SIG; the MITRE framework.

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