@article {RomanFog16, title = {Mobile edge computing, Fog et al.: A survey and analysis of security threats and challenges}, journal = {Future Generation Computer Systems}, volume = {78}, year = {2018}, month = {01/2018}, pages = {680-698}, publisher = {Elsevier}, abstract = {

For various reasons, the cloud computing paradigm is unable to meet certain requirements (e.g. low latency and jitter, context awareness, mobility support) that are crucial for several applications (e.g. vehicular networks, augmented reality). To fulfil these requirements, various paradigms, such as fog computing, mobile edge computing, and mobile cloud computing, have emerged in recent years. While these edge paradigms share several features, most of the existing research is compartmentalised; no synergies have been explored. This is especially true in the field of security, where most analyses focus only on one edge paradigm, while ignoring the others. The main goal of this study is to holistically analyse the security threats, challenges, and mechanisms inherent in all edge paradigms, while highlighting potential synergies and venues of collaboration. In our results, we will show that all edge paradigms should consider the advances in other paradigms.

}, keywords = {Cloud Computing, Fog computing, Mobile cloud computing, Mobile edge computing, privacy, security}, issn = {0167-739X}, doi = {10.1016/j.future.2016.11.009}, url = {https://authors.elsevier.com/c/1VmhQ,3q5xKgZZ}, author = {Rodrigo Roman and Javier Lopez and Masahiro Mambo} } @incollection {nunez15privacy, title = {Privacy-Preserving Identity Management as a Service}, booktitle = {Accountability and Security in the Cloud}, series = {Lecture Notes in Computer Science}, volume = {8937}, year = {2015}, pages = {114-125}, publisher = {Springer International Publishing}, organization = {Springer International Publishing}, abstract = {

In this paper we tackle the problem of privacy and confidentiality in Identity Management as a Service (IDaaS). The adoption of cloud computing technologies by organizations has fostered the externalization of the identity management processes, shaping the concept of Identity Management as a Service. However, as it has happened to other cloud-based services, the cloud poses serious risks to the users, since they lose the control over their data. As part of this work, we analyze these concerns and present a model for privacy-preserving IDaaS, called BlindIdM, which is designed to provide data privacy protection through the use of cryptographic safeguards.

}, keywords = {Cloud Computing, Cryptography, Identity Management as a Service, privacy}, isbn = {978-3-319-17198-2}, doi = {10.1007/978-3-319-17199-9_5}, url = {http://dx.doi.org/10.1007/978-3-319-17199-9_5}, author = {David Nu{\~n}ez and Isaac Agudo and Javier Lopez}, editor = {Massimo Felici and Carmen Fernandez-Gago} } @article {alcaraz2013b, title = {WASAM: A Dynamic Wide-Area Situational Awareness Model for Critical Domains in Smart Grids}, journal = {Future Generation Computer Systems}, volume = {30}, year = {2014}, pages = {146-154}, publisher = {Elsevier}, abstract = {

Control from anywhere and at anytime is nowadays a matter of paramount importance in\ critical systems. This is the case of the Smart Grid and its domains which should be monitored through\ intelligent and dynamic mechanisms able to anticipate, detect and respond before disruptions arise\ within the system. Given this fact and its importance for social welfare and the economy, a model for\ wide-area situational awareness is proposed in this paper. The model is based on a set of current\ technologies such as the wireless sensor networks, the ISA100.11a standard and cloud-computing\ together with a set of high-level functional services. These services include global and local support for\ prevention through a simple forecast scheme, detection of anomalies in the observation tasks,\ response to incidents, tests of accuracy and maintenance, as well as recovery of states and control in\ crisis situations.

}, keywords = {Cloud Computing, Critical Infrastructure Protection, Smart Grid, Wide-Area Situational Awareness, wireless sensor networks}, issn = {0167-739X}, doi = {https://doi.org/10.1016/j.future.2013.06.030}, author = {Cristina Alcaraz and Javier Lopez} } @inproceedings {nunez2012integrating, title = {Integrating OpenID with Proxy Re-Encryption to enhance privacy in cloud-based identity services}, booktitle = {IEEE CloudCom 2012}, year = {2012}, month = {Dec 2012}, pages = {241 - 248}, publisher = {IEEE Computer Society}, organization = {IEEE Computer Society}, address = {Taipei, Taiwan}, abstract = {

The inclusion of identity management in the cloud computing landscape represents a new business opportunity for providing what has been called Identity Management as a Service (IDaaS). Nevertheless, IDaaS introduces the same kind of problems regarding privacy and data confidentiality as other cloud services; on top of that, the nature of the outsourced information (users{\textquoteright} identity) is critical. Traditionally, cloud services (including IDaaS) rely only on SLAs and security policies to protect the data, but these measures have proven insufficient in some cases; recent research has employed advanced cryptographic mechanisms as an additional safeguard. Apart from this, there are several identity management schemes that could be used for realizing IDaaS systems in the cloud; among them, OpenID has gained crescent popularity because of its open and decentralized nature, which makes it a prime candidate for this task. In this paper we demonstrate how a privacy-preserving IDaaS system can be implemented using OpenID Attribute Exchange and a proxy re-encryption scheme. Our prototype enables an identity provider to serve attributes to other parties without being able to read their values. This proposal constitutes a novel contribution to both privacy and identity management fields. Finally, we discuss the performance and economical viability of our proposal.

}, keywords = {Cloud Computing, Cryptography, identity management, OpenID, privacy, proxy re-encryption}, isbn = {978-1-4673-4511-8}, issn = {978-1-4673-4509-5}, doi = {10.1109/CloudCom.2012.6427551}, author = {David Nu{\~n}ez and Isaac Agudo and Javier Lopez} } @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} }