C4tasojen

C4tasojen is a term used to describe a four-level classification framework designed to organize elements, processes, or assets by increasing depth, sensitivity, or complexity. The designation combines the idea of four levels with the suffix tasojen, a word form found in several Nordic languages, and is used in a range of domains to support structured decision-making and governance.

The framework defines four distinct levels, commonly labeled C1 through C4. Each level specifies criteria related to access, handling requirements, risk impact, and organizational ownership. Level C1 typically covers public or low-risk items with minimal controls. Level C2 introduces moderate restrictions and additional metadata or context. Level C3 applies stronger authentication, formal authorization, and tighter governance. Level C4 represents the highest level of protection, with comprehensive controls, auditing, and containment measures.

Key characteristics across levels include access rules, data handling practices, monitoring requirements, and impact considerations. The levels are intended to be interoperable with other classification schemes and can be adapted to fit different industries, such as information governance, software architecture, or policy development. They are often implemented through policy documents, taxonomy schemas, and corresponding workflow procedures to guide classification, risk assessment, and incident response.

Applications of C4tasojen include helping organizations prioritize security or quality controls, guiding component exposure in software design, and structuring procedures for data stewardship. Variants of the model may add sublevels, combine levels with regulatory mappings, or tailor criteria to specific organizational contexts. See also data classification, access control, and risk management frameworks.