Formalizing execution semantics of UML profiles with fUML models

International audienceUML Profiles are not only sets of annotations. They have semantics. Executing a model on which a profile is applied requires semantics of this latter to be considered. The issue is that in practice semantics of profiles are mainly specified in prose. In this form it cannot be processed by tools enabling model execution. Although latest developments advocate for a standard way to formalize semantics of profiles, no such approach could be found in the literature. This paper addresses this issue with a systematic approach based on fUML to formalize the execution semantics of UML profiles. This approach is validated by formalizing the execution semantics of a subset of the MARTE profile. The proposal is compatible with any tool implementing UML and clearly identifies the mapping between stereotypes and semantic definitions

Model-Based Real-Time Evaluation of Security Patterns: A SCADA System Case Study

International audienceSecuring critical systems such as cyber physical systems (CPS) is an important feature especially when it comes to critical transmitted data. At the same time, the implementation of security counter-measures in such systems may impact other functional or non-functional concerns. In this context, we propose a model-based approach for securing critical systems at early design stage. This approach combines security analysis and mitigation solution proposals with multi-concern architectural evaluation. It exploits two views of security counter-measures patterns: abstract and concrete. The abstract view is used to select relevant solutions to security requirements on a logical point of view. Then, the concrete view helps the architect evaluating different possible implementation alternatives against other design constraints. The modeling is based on accepted OMG standards such as UML and MARTE. In this paper, the approach is illustrated on a SCADA (Supervisory Control and Data Acquisition) system case study and a tool chain based on Papyrus UML supports the approach