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See detailModularity and Dynamic Adaptation of Flexibly Secure Systems: Model-Driven Adaptive Delegation in Access Control Management
Nguyen, Phu Hong UL; Nain, Grégory UL; Klein, Jacques UL et al

in Transactions on Aspect-Oriented Software Development (2014), 11

Model-Driven Security (Mds) is a specialized Model-Driven Engineering (Mde) approach for supporting the development of secure systems. Model-Driven Security aims at improving the productivity of the ... [more ▼]

Model-Driven Security (Mds) is a specialized Model-Driven Engineering (Mde) approach for supporting the development of secure systems. Model-Driven Security aims at improving the productivity of the development process and quality of the resulting secure systems, with models as the main artifact. Among the variety of models that have been studied in a Model-Driven Security perspective, one canmention access control models that specify the access rights. So far, these models mainly focus on static definitions of access control policies, without taking into account the more complex, but essential, delegation of rights mechanism. Delegation is a meta-level mechanism for administrating access rights, which allows a user without any specific administrative privileges to delegate his/her access rights to another user. This paper gives a formalization of access control and delegation mechanisms, and analyses the main hard-points for introducing various advanced delegation semantics in Model-Driven Security. Then, we propose a modular model-driven framework for 1) specifying access control, delegation and the business logic as separate concerns; 2) dynamically enforcing/weaving access control policies with various delegation features into security-critical systems; and 3) providing a flexibly dynamic adaptation strategy.We demonstrate the feasibility and effectiveness of our proposed solution through the proof-of-concept implementations of different component-based systems running on different adaptive execution platforms, i.e. OSGi and Kevoree. [less ▲]

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See detailUsing VCL as an Aspect-Oriented Approach to Requirements Modelling
Amalio, Nuno UL; Kelsen, Pierre UL; Ma, Qin UL et al

in Transactions on Aspect-Oriented Software Development (2010), 7

Software systems are becoming larger and more complex. By tackling the modularisation of crosscutting concerns, aspect-orientation draws attention to modularity as a means to address the problems of ... [more ▼]

Software systems are becoming larger and more complex. By tackling the modularisation of crosscutting concerns, aspect-orientation draws attention to modularity as a means to address the problems of scalability, complexity and evolution in software systems development. Aspect-oriented modelling (AOM) applies aspect-orientation to the construction of models. Most existing AOM approaches are designed without a formal semantics, and use multi-view partial descriptions of behaviour. This paper presents an AOM approach based on the Visual Contract Language (VCL): a visual language for abstract and precise modelling, designed with a formal semantics, and comprising a novel approach to visual behavioural modelling based on design by contract where behavioural descriptions are total. By applying VCL to a large case study of a car-crash crisis management system, the paper demonstrates how modularity of VCL's constructs, at different levels of granularity, help to tackle complexity. In particular, it shows how VCL's package construct and its associated composition mechanisms are key in supporting separation of concerns, coarse-grained problem decomposition and aspect-orientation. The case study's modelling solution has a clear and well-defined modular structure; the backbone of this structure is a collection of packages encapsulating local solutions to concerns. [less ▲]

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See detailAspect-Oriented Design with Reusable Aspect Models
Joerg, Kienzle; Wisam, Al Abedl; Fleurey, Franck et al

in Transactions on Aspect-Oriented Software Development (2010)

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