But which UML diagrams are the most useful for system architecture documentation ... and they can be used to control and monitor your system.

Security architecture diagrams are visual representations of how the different components of a system or network interact ... descriptions expressed in BPMN, UML or data modelling notations ...

Abstract: Useful enhancements to UML for ... misuse case diagrams/descriptions, mis-sequence diagrams, UMLpac, and security patterns. These all consider security attacks on software functionality.