Dictionary · Engineering Trustworthy Secure Systems

Worthy of being trusted to fulfill whatever critical requirements may be needed for a particular component, subsystem, system, network, application, mission, enterprise, or other entity.

Condition that deviates from expectations, based on requirements specifications, design documents, user documents, or standards, or from someone's perceptions or experiences.

A set of elements, data, resources, and functions that share a commonality in combinations of: (1) roles supported, (2) rules governing their use, and (3) protection needs.

Continual checking, supervising, critically observing or determining the status in order to identify change from the performance level required or expected.

Individual or organization that performs the operations of a system.

Perception of elements in the system and/or environment and a comprehension of their meaning, which could include a projection of the future status of perceived elements and the uncertainty associated with that status.