The Si* Modeling Framework: Metamodel and Applications

Security Requirements Engineering is emerging spurred by the realization that security must be dealt from the early phases of the system development process. Modeling languages in this field are challenging as they must provide concepts appropriate in order to talk about security within an organization. In previous work we introduced the SI* modeling language tailored to capture security aspects of socio-technical systems. SI* is founded on four main notions, namely supervision, permission, delegation, and trust. In this paper, we present the SI* metamodel. We also present some frameworks and methodologies founded on this modeling language for the analysis of security and dependability requirements as well as the exploration of design alternatives and the generation of skeletons of secure business processes. The paper also presents a development environment that uses the SI* metamodel as its basis core.