ISO/IEC 15408-3:2008定义了评估标准的保证要求。它包括定义评估目标（TOE）的评估保证等级、定义组合TOE的测量保证等级的组合保证包、构成保证等级和包的各个保证组件，以及评估保护概况和安全目标的标准。 ISO/IEC 15408-3:2008以保证类别、系列和组件的形式定义了保证要求的内容和表示，并就新保证要求的组织提供了指导。 保证族中的保证组件按层次顺序显示。

ISO/IEC 15408-3:2008 defines the assurance requirements of the evaluation criteria. It includes the evaluation assurance levels that define a scale for measuring assurance for component targets of evaluation (TOEs), the composed assurance packages that define a scale for measuring assurance for composed TOEs, the individual assurance components from which the assurance levels and packages are composed, and the criteria for evaluation of protection profiles and security targets. ISO/IEC 15408-3:2008 defines the content and presentation of the assurance requirements in the form of assurance classes, families and components and provides guidance on the organization of new assurance requirements. The assurance components within the assurance families are presented in a hierarchical order.