@inproceedings {1643, title = {Managing Incidents in Smart Grids {\`a} la Cloud}, booktitle = {IEEE CloudCom 2011}, year = {2011}, month = {Nov-Dec 2011}, pages = {527-531}, publisher = {IEEE Computer Society}, organization = {IEEE Computer Society}, address = {Athens, Greece}, abstract = {

During the last decade, the Cloud Computing paradigm has emerged as a panacea for many problems in traditional IT infrastructures. Much has been said about the potential of Cloud Computing in the Smart Grid context, but unfortunately it is still relegated to a second layer when it comes to critical systems. Although the advantages of outsourcing those kind of applications to the cloud is clear, data confidentiality and operational privacy stand as mayor drawbacks. In this paper, we try to give some hints on which security mechanisms and more specific, which cryptographic schemes, will help a better integration of Smart Grids and Clouds. We propose the use of Virtual SCADA in the Cloud (VS-Cloud) as a mean to improve reliability and efficiency whilst maintaining the same protection level as in traditional SCADA architectures.

}, keywords = {Cloud Computing, Cryptography, Incident Management, SCADA Systems, Searchable Encryption, Smart Grid}, isbn = {978-0-7695-4622-3}, doi = {10.1109/CloudCom.2011.79}, author = {Cristina Alcaraz and Isaac Agudo and David Nu{\~n}ez and Javier Lopez} } @article {vivas2010, title = {A methodology for security assurance-driven system development}, journal = {Requirements Engineering}, volume = {16}, number = {1}, year = {2011}, month = {Mar 2011}, pages = {55-73}, publisher = {Springer}, abstract = {

In this work, we introduce an assurance methodology that integrates assurance case creation with system development. It has been developed in order to provide trust and privacy assurance to the evolving European project PICOS (Privacy and Identity Management for Community Services), an international research project focused on mobile communities and community-supporting services, with special emphasis on aspects such as privacy, trust, and identity management. The leading force behind the approach is the ambition to develop a methodology for building and maintaining security cases throughout the system development life cycle in a typical system engineering effort, when much of the information relevant for assurance is produced and feedback can be provided to system developers. The first results of the application of the methodology to the development of the PICOS platform are presented.

}, issn = {0947-3602}, doi = {10.1007/s00766-010-0114-8}, author = {Jose L. Vivas and Isaac Agudo and Javier Lopez} } @inproceedings {Agudo2009a, title = {A Multidimensional Reputation Scheme for Identity Federations}, booktitle = {Sixth European Workshop on Public Key Services, Applications and Infrastructures (EuroPKI{\textquoteright}09)}, series = {LNCS}, volume = {6391}, year = {2009}, pages = {225-238}, publisher = {Springer}, organization = {Springer}, abstract = {

Deciding who to trust in the internet of services paradigm is an important and open question. How to do it in an optimal way is not always easy to determine. Trust is usually referred to a particular context whereas a single user may interact in more than one given context. We are interested in investigating how a Federated Reputation System can help exporting trust perceptions from one context to another. We propose a model for deriving trust in online services. In this context, trust is defined as the level of confidence that the service provider holds on the subject interacting with it to behave in a proper way while using the service. Thus, we derive trust by using the reputation values that those users have gained for interacting with these services.

}, isbn = {978-3-642-16440-8}, issn = {0302-9743 (Print) 1611-3349 (Online)}, doi = {10.1007/978-3-642-16441-5_15}, author = {Isaac Agudo and Carmen Fernandez-Gago and Javier Lopez} } @inproceedings {Agudo2008a, title = {A Model for Trust Metrics Analysis}, booktitle = {5th International Conference on Trust, Privacy and Security in Digital Business (TrustBus{\textquoteright}08)}, series = {LNCS}, volume = {5185}, year = {2008}, pages = {28-37}, publisher = {Springer}, organization = {Springer}, abstract = {

Trust is an important factor in any kind of network essential, for example, in the decision-making process. As important as the definition of trust is the way to compute it. In this paper we propose a model for defining trust based on graph theory and show examples of some simple operators and functions that will allow us to compute trust.

}, isbn = {978-3-540-85734-1}, issn = {0302-9743 (Print) 1611-3349 (Online)}, doi = {10.1007/978-3-540-85735-8_4}, author = {Isaac Agudo and Carmen Fernandez-Gago and Javier Lopez} }