Goal Modelling for Security Problem Matching and Pattern Enforcement

Earlier detection of security problems and implementation of solutions would be a cost- effective approach for developing secure software systems. Developing, gathering and sharing similar repeatable programming knowledge and solutions has led to the introduction of Patterns in the 90’s. The same concept has been adopted to realise recurring security knowledge and hence security patterns. Detecting a security problem using the patterns in requirements models may lead to its early prevention. In this paper, we have provided an overview of security patterns in the past two decades, followed by a summary of i*/Tropos goal modelling framework. Section 2 outlines model-driven development, meta-models and model transformation, within the context of requirements engineering. We have summarised security access control types, and formally described role-based access control (RBAC) in particular as a pattern that may occur in the stakeholder requirements models. Then we have used the i* modelling language and some elements from its constructs - model-driven queries and transformations - to describe the pattern enforcement. Applied to a number of requirements models within literature, the pattern-based transformation tool we designed has automated the detection and resolution of this security pattern in several goal-oriented stakeholder requirements. Finally, the paper also reflects on a variety of existing applications and future work