    @article {Alcaraz2011,
	title = {An Early Warning System based on Reputation for Energy Control Systems},
	journal = {IEEE Transactions on Smart Grid},
	volume = {2},
	number = {4},
	year = {2011},
	month = {Nov 2011},
	pages = {827-834},
	publisher = {IEEE},
	abstract = {<p>Most of energy control or SCADA (Supervisory Control and Data Acquisition) systems are very dependent on advanced technologies and on traditional security mechanisms for protecting the a system against anomalous events. Security mechanisms are not enough to be used in critical systems, since they can only detect anomalous events occurring at a certain moment in time. For this reason it becomes of paramount importance the usage of intelligent systems with capability for preventing anomalous situations and reacting against them on time. This type of systems are, for example, Early Warning Systems (EWS). In this paper, we propose an EWS based on Wireless Sensor Networks (WSNs) (under the ISA100.11a standard) and reputation for controling the network behaviour. The WSN are organized into clusters where a Cluster Head (CH) is designated. This CH will contain a Reputation Manager Module. The usability of this approach is also analyzed considering a Smart Grid scenario.} keywords = {Critical Information Infrastructures, Sensor Networks, Early Warning Systems, Reputation, SCADA Systems, Smart Grid.</p>
},
	keywords = {Early Warning Systems, Reputation, SCADA Systems, Smart Grid, wireless sensor networks},
	issn = {1949-3053},
	doi = {10.1109/TSG.2011.2161498},
	author = {Cristina Alcaraz and Carmen Fernandez-Gago and Javier Lopez}
}
