Browsing by Author "Aubert, Jocelyn"
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- Assurance and trust indicators to evaluate accuracy of on-line risk in critical infrastructuresPublication . Schaberreiter, Thomas; Caldeira, Filipe; Aubert, Jocelyn; Monteiro, Edmundo; Khadraoui, Djamel; Simoes, PauloCritical infrastructure (CI) services are consumed by the society constantly and we expect them to be available 24 hours a day. A common definition is that CIs are so vital to our society that a disruption or destruction would have a severe impact on the social well-being and the economy on national and international levels. CIs can be mutually dependent on each other and a failure in one infrastructure can cascade to another (inter)dependent infrastructure and cause service disruptions. Methods to better assess and monitor CIs and their (inter)dependencies at run-time in order to be able to evaluate possible risks have to be developed. Furthermore, methods to ensure the validity of evaluated risk have to be investigated. In this work, we build on existing work of CI security modelling, a CI model that allows modelling the risks of CI services at run-time. We conduct a study of indicators allowing to evaluate the correctness of calculated service risk, taking into account various sources contributing to this evaluation. Trust-based indicators are introduced to capture the dynamically changing behaviour of a system.
- Design and implementation of a mediation system enabling secure communication among Critical InfrastructuresPublication . Castrucci, Marco; Neri, Alessandro; Caldeira, Filipe; Aubert, Jocelyn; Khadraoui, Djamel; Aubigny, Matthieu; Harpes, Carlo; Simoes, Paulo; Suraci, Vincenzo; Capodieci, PaoloNowadays, the increase of interdependencies among different Critical Infrastructures (CI) makes it more and more difficult to protect without using a systemic approach that considers a single infrastructure as part of a complex system of infrastructures. A strong collaboration among CI owners is required to avoid, or at least to limit the propagation of failures from one infrastructure to another and to put CI in safety mode. The key element enabling this required cooperation is the possibility for them to exchange relevant information related to the status of their infrastructures and to the services provided. In this paper, we present a middleware solution that allows CIs sharing real-time information, enabling the design and implementation of fault mitigation strategies and mechanisms to prevent the cascading phenomena generated by the failure propagation from one infrastructure to another.
- Improved Resilience of Interdependent Critical Infrastructures via on-line Alerting SystemPublication . Capodieci, Paolo; Diblasi, Stefano; Ciancamerla, Ester; Minichino, Michele; Foglietta, Chiara; Lefevre, Davide; Oliva, Gabriele; Panzieri, Stefano; Setola, Roberto; De Porcellinis, Stefano; Delli Priscoli, Francesco; Castrucci, Marco; Suraci, Vincenzo; Lev, Leonid; Shneck, Yosi; Khadraoui, Djamel; Aubert, Jocelyn; Iassinovski, Serguei; Jiang, Jianmin; Simoes, Paulo; Caldeira, Filipe; Spronska, Agnieszka; Harpes, Carlo; Aubigny, MatthieuThis paper illustrates the activities under development within the FP7 EU MICIE project. The project is devoted to design and implement an on-line alerting system, able to evaluate, in real time, the level of risk of interdependent Critical Infrastructures (CIs). Such a risk is generated by undesired events and by the high level of interconnection of the different infrastructures. Heterogeneous models are under development to perform short term predictions of the Quality of Service (QoS) of each CI according to the QoS of the others, to the level of interdependency among the Infrastructures, and according to the undesired events identified in the reference scenario.