    @article {alcarazlopez-IEEESystems-2017,
	title = {A Cyber-Physical Systems-Based Checkpoint Model for Structural Controllability},
	journal = {IEEE Systems Journal},
	volume = {12},
	year = {2018},
	month = {12/2018},
	pages = {3543-3554},
	publisher = {IEEE},
	abstract = {<p class="rtejustify">The protection of critical user-centric applications,\&nbsp;such as Smart Grids and their monitoring systems, has become\&nbsp;one of the most cutting-edge research areas in recent years.\&nbsp;The dynamic complexity of their cyber-physical systems (CPSs)\&nbsp;and their strong inter-dependencies with power systems, are\&nbsp;bringing about a significant increase in security problems that\&nbsp;may be exploited by attackers. These security holes may, for\&nbsp;example, trigger the disintegration of the structural controllability\&nbsp;properties due to the problem of non-locality, affecting, sooner\&nbsp;or later, the provision of the essential services to end-users.\&nbsp;One way to address these situations could be through automatic\&nbsp;checkpoints in charge of inspecting the healthy status of the\&nbsp;control network and its critical nature. This inspection can be\&nbsp;subject to special mechanisms\&nbsp;composed of trustworthy cyberphysical\&nbsp;elements\&nbsp;capable of detecting structural changes in the\&nbsp;control and activating restoration procedures\&nbsp;with support for\&nbsp;warning. This is precisely the aim of this paper, which presents\&nbsp;a CPSs-based checkpoint model with the capacity to manage\&nbsp;heterogeneous replications that help ensure data redundancy,\&nbsp;thereby guaranteeing the validity of the checkpoints. As a support\&nbsp;to this study,\&nbsp;a theoretical and practical analysis is addressed to\&nbsp;show the functionality of the approach in real contexts.</p>
},
	keywords = {Critical Control Systems, cyber-physical systems, Smart grids, structural controllability},
	issn = {1932-8184},
	doi = {https://doi.org/10.1109/JSYST.2017.2740719},
	url = {http://ieeexplore.ieee.org/document/8057984/},
	author = {Cristina Alcaraz and Javier Lopez}
}
