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DOI: 10.4230/LIPIcs.ECRTS.2017.23
Contego: An Adaptive Framework for Integrating Security Tasks in Real-Time Systems

Authors: Monowar Hasan, Sibin Mohan, Rodolfo Pellizzoni, and Rakesh B. Bobba

Published in: LIPIcs, Volume 76, 29th Euromicro Conference on Real-Time Systems (ECRTS 2017)

Abstract
Embedded real-time systems (RTS) are pervasive. Many modern RTS are exposed to unknown security flaws, and threats to RTS are growing in both number and sophistication. However, until recently, cyber-security considerations were an afterthought in the design of such systems. Any security mechanisms integrated into RTS must (a) co-exist with the real-time tasks in the system and (b) operate without impacting the timing and safety constraints of the control logic. We introduce Contego, an approach to integrating security tasks into RTS without affecting temporal requirements. Contego is specifically designed for legacy systems, viz., the real-time control systems in which major alterations of the system parameters for constituent tasks is not always feasible. Contego combines the concept of opportunistic execution with hierarchical scheduling to maintain compatibility with legacy systems while still providing flexibility by allowing security tasks to operate in different modes. We also define a metric to measure the effectiveness of such integration. We evaluate Contego using synthetic workloads as well as with an implementation on a realistic embedded platform (an open-source ARM CPU running real-time Linux).
Cite as

Monowar Hasan, Sibin Mohan, Rodolfo Pellizzoni, and Rakesh B. Bobba. Contego: An Adaptive Framework for Integrating Security Tasks in Real-Time Systems. In 29th Euromicro Conference on Real-Time Systems (ECRTS 2017). Leibniz International Proceedings in Informatics (LIPIcs), Volume 76, pp. 23:1-23:22, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2017)

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@InProceedings{hasan_et_al:LIPIcs.ECRTS.2017.23,
  author =	{Hasan, Monowar and Mohan, Sibin and Pellizzoni, Rodolfo and Bobba, Rakesh B.},
  title =	{{Contego: An Adaptive Framework for Integrating Security Tasks in Real-Time Systems}},
  booktitle =	{29th Euromicro Conference on Real-Time Systems (ECRTS 2017)},
  pages =	{23:1--23:22},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-037-8},
  ISSN =	{1868-8969},
  year =	{2017},
  volume =	{76},
  editor =	{Bertogna, Marko},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.ECRTS.2017.23},
  URN =		{urn:nbn:de:0030-drops-71728},
  doi =		{10.4230/LIPIcs.ECRTS.2017.23},
  annote =	{Keywords: Real-Time Systems, Security, Hierarchical Scheduling}
}
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