A Language-Based Multi-View Approach for Combining Functional and Security Models

The design flaws and attacks on Cyber-Physical Systems (CPSs) can lead to severe consequences. Thus, security and safety (S&S) issues should be taken into account with functional design as early as possible during the developing process. However, it's rare to see 'one-size-fits-all' modeling language and/or design tool. One way to solve this issue is to integrate different nature models into one model system, but this requires a unified semantic among modeling languages. We explore a model-based approach for systems engineering that facilitates the composition of several heterogeneous artifacts (called views) into a sound and consistent system model. Rather than trying to extend either SysML or SysML-sec into more expressive languages to add the missing features, we extract proper subsets of both languages to build a view adequate for conducting a security and safety analysis of Capella (SysML-based) functional models. Our language is generic enough to extract proper subsets of languages and combine them to build views for different experts. Moreover, it maintains a global consistency between the different views.