Applied Dynamic Policy Selection

Florian Reimair, Bernd Prünster, Andreas Reiter, Christian Ertler

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review


Cloud key services are prominent targets for attacks. In fact, every service guarding sensitive data uses a policy system to do so. As of today, such policies are mostly static. However, as system environments change and attacks grow more sophisticated, such static policies cannot always sufficiently cope with attacks and may even unnecessarily hinder the legitimate user. We believe that more fine-grained and reactive protection systems are needed to meet modern security requirements. We propose a concept to separate the concerns of policy enforcement and the policies themselves as a basis for more flexible and dynamic policy enforcement. With policies no longer interfering with a system's business logic, we can introduce strategies and actions which preselect rules based on system information for the policy enforcement to use. In order to understand the characteristics and capabilities of the proposed concept, we implemented two case studies based on CrySIL and XACML. We show that our concept can can be gradually integrated with existing systems while at the same time easing maintenance of policy sets. Furthermore, it enables policy sharing and joint definition and refinement of strategies, actions, and security rules, resulting in powerful security policies at minimal cost. All in all, our solution fosters deployment of reactive security systems.
Original languageEnglish
Title of host publication2016 IEEE Conference on Communications and Network Security (CNS 2016)
Number of pages9
ISBN (Electronic)978-1-5090-3065-1
Publication statusPublished - 19 Oct 2016
Event2016 IEEE Conference on Communications and Network Security: CNS 2016 - Philadelphia, United States
Duration: 17 Oct 201619 Oct 2016


Conference2016 IEEE Conference on Communications and Network Security
Country/TerritoryUnited States


  • dynamic security policies
  • reactive security systems
  • cloud key service

ASJC Scopus subject areas

  • Computer Science (miscellaneous)


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  • A-SIT - Secure Information Technology Center Austria

    Stranacher, K., Dominikus, S., Leitold, H., Marsalek, A., Teufl, P., Bauer, W., Aigner, M. J., Rössler, T., Neuherz, E., Dietrich, K., Zefferer, T., Mangard, S., Payer, U., Orthacker, C., Lipp, P., Reiter, A., Knall, T., Bratko, H., Bonato, M., Suzic, B., Zwattendorfer, B., Kreuzhuber, S., Oswald, M. E., Tauber, A., Posch, R., Bratko, D., Feichtner, J., Ivkovic, M., Reimair, F., Wolkerstorfer, J. & Scheibelhofer, K.


    Project: Research area

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