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D. Nuñez, and I. Agudo, "BlindIdM: A Privacy-Preserving Approach for Identity Management as a Service",
International Journal of Information Security, vol. 13, issue 2, Springer, pp. 199-215, 2014. DOI (I.F.: 0.963)More..

Abstract

Identity management is an almost indispensable component of today’s organizations and companies, as it plays a key role in authentication and access control; however, at the same time it is widely recognized as a costly and time-consuming task. The advent of cloud computing technologies, together with the promise of flexible, cheap and efficient provision of services, has provided the opportunity to externalize such a common process, shaping what has been called Identity Management as a Service (IDaaS). Nevertheless, as in the case of other cloud-based services, IDaaS brings with it great concerns regarding security and privacy, such as the loss of control over the outsourced data. In this paper we analyze these concerns and propose BlindIdM, a model for privacy-preserving IDaaS with a focus on data privacy protection. In particular, we describe how a SAML-based system can be augmented to employ proxy re-encryption techniques for achieving data condentiality with respect to the cloud provider, while preserving the ability to supply the identity service. This is an innovative contribution to both the privacy and identity management landscapes.

Impact Factor: 0.963
Journal Citation Reports® Science Edition (Thomson Reuters, 2014)

PDF icon nunez2014blindidm.pdf (628.97 KB)
D. Nuñez, I. Agudo, and J. Lopez, "Privacy-Preserving Identity Management as a Service",
Accountability and Security in the Cloud, M. Felici, and C. Fernandez-Gago Eds., Lecture Notes in Computer Science 8937, Springer International Publishing, pp. 114-125, 2015. DOI More..

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.

D. Nuñez, C. Fernandez-Gago, and J. Luna, "Eliciting Metrics for Accountability of Cloud Systems",
Computers & Security, vol. 62, Elsevier, pp. 149-164, 08/2016. DOI (I.F.: 2.849)More..

Abstract

Cloud computing provides enormous business opportunities, but at the same time is a complex and challenging paradigm. The major concerns for users adopting the cloud are the loss of control over their data and the lack of transparency. Providing accountability to cloud systems could foster trust in the cloud and contribute toward its adoption. Assessing how accountable a cloud provider is becomes then a key issue, not only for demonstrating accountability, but to build it. To this end, we need techniques to measure the factors that influence on accountability. In this paper, we provide a methodology to elicit metrics for accountability in the cloud, which consists of three different stages. Since the nature of accountability at- tributes is very abstract and complex, in the first stage we perform a conceptual analysis of the accountability attributes in order to decompose them into concrete practices and mechanisms. Then, we analyze relevant control frameworks designed to guide the implementation of security and privacy mechanisms, and use them to identify measurable factors, related to the practices and mechanisms defined earlier. Lastly, specific metrics for these factors are derived. We also provide some strategies that we consider relevant for the empirical validation of the elicited accountability metrics. 

Impact Factor: 2.849
Journal Citation Reports® Science Edition (Thomson Reuters, 2016)

PDF icon nunez2016eliciting.pdf (460.29 KB)
D. Nuñez, I. Agudo, and J. Lopez, "The fallout of key compromise in a proxy-mediated key agreement protocol",
31st Annual IFIP WG 11.3 Conference on Data and Applications Security and Privacy (DBSec'17), vol. LNCS 10359, Springer, pp. 453-472, 07/2017. DOI More..

Abstract

In this paper, we analyze how key compromise affects the protocol by Nguyen et al. presented at ESORICS 2016, an authenticated key agreement protocol mediated by a proxy entity, restricted to only symmetric encryption primitives and intended for IoT environments. This protocol uses long-term encryption tokens as intermediate values during encryption and decryption procedures, which implies that these can be used to encrypt and decrypt messages without knowing the cor- responding secret keys. In our work, we show how key compromise (or even compromise of encryption tokens) allows to break forward secu- rity and leads to key compromise impersonation attacks. Moreover, we demonstrate that these problems cannot be solved even if the affected user revokes his compromised secret key and updates it to a new one. The conclusion is that this protocol cannot be used in IoT environments, where key compromise is a realistic risk. 

PDF icon nunez2017fallout.pdf (531.92 KB)
D. Nuñez, I. Agudo, and J. Lopez, "Escrowed decryption protocols for lawful interception of encrypted data",
IET Information Security, vol. 13, issue 5, IET, pp. 498 -- 507, 09/2019. More..

Abstract

Escrowed decryption schemes (EDSs) are public-key encryption schemes with an escrowed decryption functionality that allows authorities to decrypt encrypted messages under investigation, following a protocol that involves a set of trusted entities called `custodians'; only if custodians collaborate, the requesting authority is capable of decrypting encrypted data. This type of cryptosystem represents an interesting trade-off to privacy versus surveillance dichotomy. In this study, the authors propose two EDSs where they use proxy re-encryption to build the escrowed decryption capability, so that custodians re-encrypt ciphertexts, in a distributed way, upon request from an escrow authority, and the re-encrypted ciphertexts can be opened only by the escrow authority. Their first scheme, called EDS, follows an all-or-nothing approach, which means that escrow decryption only works when all custodians collaborate. Their second scheme, called threshold EDS, supports a threshold number of custodians for the escrow decryption operation. They propose definitions of semantic security with respect to the authorities, custodians and external entities, and prove the security of their schemes, under standard pairing-based hardness assumptions. Finally, they present a theoretical and experimental analysis of the performance of both schemes, which show that they are applicable to real-world scenarios.

D. Nuñez, I. Agudo, and J. Lopez, "On the Application of Generic CCA-Secure Transformations to Proxy Re-Encryption",
Security and Communication Networks, vol. 9, issue 12, Wiley, pp. 1769-1785, 08/2016. DOI (I.F.: 1.067)More..

Abstract

Several generic methods exist for achieving chosen-ciphertext attack (CCA)-secure public-key encryption schemes from weakly secure cryptosystems, such as the Fujisaki–Okamoto and REACT transformations. In the context of proxy re-encryption (PRE), it would be desirable to count on analogous constructions that allow PRE schemes to achieve better security notions. In this paper, we study the adaptation of these transformations to proxy re-encryption and find both negative and positive results. On the one hand, we show why it is not possible to directly integrate these transformations with weakly secure PRE schemes because of general obstacles coming from both the constructions themselves and the security models, and we identify 12 PRE schemes that exhibit these problems. On the other hand, we propose an extension of the Fujisaki–Okamoto transformation for PRE, which achieves a weak form of CCA security in the random oracle model, and we describe the sufficient conditions for applying it

Impact Factor: 1.067
Journal Citation Reports® Science Edition (Thomson Reuters, 2016)

PDF icon nunez2016application.pdf (437.22 KB)
D. Nuñez, I. Agudo, and J. Lopez, "NTRUReEncrypt: An Efficient Proxy Re-Encryption Scheme Based on NTRU",
10th ACM Symposium on Information, Computer and Communications Security (AsiaCCS), pp. 179-189, 04/2015. DOI More..

Abstract

The use of alternative foundations for constructing more secure and efficient cryptographic schemes is a topic worth exploring. In the case of proxy re-encryption, the vast majority of schemes are based on number theoretic problems such as the discrete logarithm. In this paper we present NTRUReEncrypt, a new bidirectional and multihop proxy re-encryption scheme based on NTRU, a widely known lattice-based cryptosystem. We provide two versions of our scheme: the first one is based on the conventional NTRU encryption scheme and, although it lacks a security proof, remains as efficient as its predecessor; the second one is based on a variant of NTRU proposed by Stehlé and Steinfeld, which is proven CPA-secure under the hardness of the Ring-LWE problem. To the best of our knowledge, our proposals are the first proxy re-encryption schemes to be based on the NTRU primitive. In addition, we provide experimental results to show the efficiency of our proposal, as well as a comparison with previous proxy re-encryption schemes, which confirms that our first scheme outperforms the rest by an order of magnitude.

PDF icon nunez2015ntrureencrypt.pdf (326.98 KB)
D. Nuñez, I. Agudo, M. Egorov, and ML. Wilkison, "Sistema de Acceso Delegado a Información Cifrada para Apache Hadoop",
III Jornadas Nacionales de Investigación en Ciberseguridad, URJC, pp. 174-175, 06/2017. More..

Abstract

En este artículo presentamos un sistema que permite delegación de acceso a información cifrada para Apache Hadoop, de forma segura y transparente al usuario. Para ello usamos técnicas criptográficas avanzadas basadas en el recifrado delegado. Con este sistema, es posible almacenar en Hadoop los datos de forma cifrada y delegar de forma segura el acceso a los nodos de computación. El funcionamiento es transparente ya que se integra con la capa del sistema de ficheros nativa HDFS. Además, el recifrado delegado permite hacer rotación de claves de cifrado de forma segura y rápida.

D. Nuñez, I. Agudo, P. Drogkaris, and S. Gritzalis, "Identity Management Challenges for Intercloud Applications",
1st International Workshop on Security and Trust for Applications in Virtualised Environments (STAVE 2011), vol. 187, pp. 198-204, June, 2011. DOI More..

Abstract

Intercloud notion is gaining a lot of attention lately from both enterprise and academia, not only because of its benefits and expected results but also due to the challenges that it introduces regarding interoperability and standardisation. Identity management services are one of the main candidates to be outsourced into the Intercloud, since they are one of the most common services needed by companies and organisations. This paper addresses emerging identity management challenges that arise in intercloud formations, such as naming, identification, interoperability, identity life cycle management and single sign-on.

PDF icon DNunez11.pdf (162.14 KB)
D. Nuñez, I. Agudo, and J. Lopez, "Proxy Re-Encryption: Analysis of Constructions and its Application to Secure Access Delegation",
Journal of Network and Computer Applications, vol. 87, Elsevier, pp. 193-209, 06/2017. DOI (I.F.: 3.991)More..

Abstract

This paper analyzes the secure access delegation problem, which occurs naturally in the cloud, and postulate that Proxy Re-Encryption is a feasible cryptographic solution, both from the functional and efficiency perspectives. Proxy re-encryption is a special type of public-key encryption that permits a proxy to transform ciphertexts from one public key to another, without the proxy being able to learn any information about the original message. Thus, it serves as a means for delegating decryption rights, opening up many possible applications that require of delegated access to encrypted data. In particular, sharing information in the cloud is a prime example. In this paper, we review the main proxy re-encryption schemes so far, and provide a detailed analysis of their characteristics. Additionally, we also study the efficiency of selected schemes, both theoretically and empirically, based on our own implementation. Finally, we discuss some applications of proxy re-encryption, with a focus on secure access delegation in the cloud. 

Impact Factor: 3.991
Journal Citation Reports® Science Edition (Thomson Reuters, 2017)

PDF icon nunez2017proxy.pdf (687.13 KB)
D. Nuñez, I. Agudo, and J. Lopez, "Integrating OpenID with Proxy Re-Encryption to enhance privacy in cloud-based identity services",
IEEE CloudCom 2012, IEEE Computer Society, pp. 241 - 248, Dec 2012. DOI More..

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’ 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.

PDF icon nunez2012integrating.pdf (254.97 KB)
D. Nuñez, I. Agudo, and J. Lopez, "Delegated Access for Hadoop Clusters in the Cloud",
IEEE International Conference on Cloud Computing Technology and Science (CloudCom 2014), IEEE, pp. 374-379, 12/2014. DOI More..

Abstract

Among Big Data technologies, Hadoop stands out for its capacity to store and process large-scale datasets. However, although Hadoop was not designed with security in mind, it is widely used by plenty of organizations, some of which have strong data protection requirements. Traditional access control solutions are not enough, and cryptographic solutions must be put in place to protect sensitive information. In this paper, we describe a cryptographically-enforced access control system for Hadoop, based on proxy re-encryption. Our proposed solution fits in well with the outsourcing of Big Data processing to the cloud, since information can be stored in encrypted form in external servers in the cloud and processed only if access has been delegated. Experimental results show that the overhead produced by our solution is manageable, which makes it suitable for some applications.

PDF icon nunez2014delegated.pdf (600.22 KB)
D. Nuñez, I. Agudo, and J. Lopez, "Nuevas nociones de seguridad y transformaciones genéricas para criptosistemas de recifrado delegado",
XIV Reunión Española sobre Criptología y Seguridad de la Información, pp. 174-179, 10/2016. More..

Abstract

El recifrado delegado (proxy re-encryption) es un tipo de cifrado de clave pública que permite delegar la capacidad de transformar textos cifrados de una clave pública a otra, sin que se pueda obtener ninguna información sobre el mensaje subyacente. Por este motivo, representa un candidato natural para construir mecanismos criptográficos de control de acceso. En este artículo estudiamos algunos de los problemas de seguridad de este tipo de criptosistemas. En primer lugar, examinamos las nociones de seguridad e identificamos una nueva familia paramétrica de modelos de ataque, que considera la disponibilidad tanto del oráculo de descifrado como de recifrado. En segundo lugar, estudiamos la aplicabilidad de transformaciones genéricas para mejorar la seguridad, centrándonos en la transformación Fujisaki-Okamoto, y formulamos las condiciones que nos permiten aplicarla.

PDF icon nunez2016nuevas.pdf (472.48 KB)
D. Nuñez, I. Agudo, and J. Lopez, "Leveraging Privacy in Identity Management as a Service through Proxy Re-Encryption",
Ph.D Symposium of the European Conference on Service-Oriented and Cloud Computing (ESOCC) 2013, September 2013. More..

Abstract

The advent of cloud computing has provided the opportunity to externalize the identity management processes, shaping what has been called Identity Management as a Service (IDaaS). However, as in the case of other cloud-based services, IDaaS brings with it great concerns regarding security and privacy, such as the loss of control over the outsourced data. As part of this PhD thesis, we analyze these concerns and propose BlindIdM, a model for privacy-preserving IDaaS with a focus on data privacy protection through the use of proxy re-encryption.

PDF icon nunez2013leveraging.pdf (276.87 KB)
D. Nuñez, C. Fernandez-Gago, S. Pearson, and M. Felici, "A Metamodel for Measuring Accountability Attributes in the Cloud",
2013 IEEE International Conference on Cloud Computing Technology and Science (CloudCom 2013), IEEE, pp. 355-362, 12/2013. DOI More..

Abstract

Cloud governance, and in particular data governance in the cloud, relies on different technical and organizational practices and procedures, such as policy enforcement, risk management, incident management and remediation. The concept of accountability encompasses such practices, and is essential for enhancing security and trustworthiness in the cloud. Besides this, proper measurement of cloud services, both at a technical and governance level, is a distinctive aspect of the cloud computing model. Hence, a natural problem that arises is how to measure the impact on accountability of the procedures held in practice by organizations that participate in the cloud ecosystem. In this paper, we describe a metamodel for addressing the problem of measuring accountability properties for cloud computing, as discussed and defined by the Cloud Accountability Project (A4Cloud). The goal of this metamodel is to act as a language for describing: (i) accountability properties in terms of actions between entities, and (ii) metrics for measuring the fulfillment of such properties. It also allows the recursive decomposition of properties and metrics, from a high-level and abstract world to a tangible and measurable one. Finally, we illustrate our proposal of the metamodel by modelling the transparency property, and define some metrics for it.

PDF icon nunez2013metamodel.pdf (304.22 KB)
D. Nuñez, I. Agudo, and J. Lopez, "A Parametric Family of Attack Models for Proxy Re-Encryption",
28th IEEE Computer Security Foundations Symposium, IEEE Computer Society, pp. 290-301, 07/2015. DOI More..

Abstract

Proxy Re-Encryption (PRE) is a type of Public-Key Encryption (PKE) which provides an additional re-encryption functionality. Although PRE is inherently more complex than PKE, attack models for PRE have not been developed further than those inherited from PKE. In this paper we address this gap and define a parametric family of attack models for PRE, based on the availability of both the decryption and re-encryption oracles during the security game. This family enables the definition of a set of intermediate security notions for PRE that ranges from ``plain'' IND-CPA to ``full'' IND-CCA. We analyze some relations among these notions of security, and in particular, the separations that arise when the re-encryption oracle leaks re-encryption keys. In addition, we discuss which of these security notions represent meaningful adversarial models for PRE. Finally, we provide an example of a recent ``CCA1- secure'' scheme from PKC 2014 whose security model does not capture chosen-ciphertext attacks through re-encryption and for which we describe an attack under a more realistic security notion. This attack emphasizes the fact that PRE schemes that leak re-encryption keys cannot achieve strong security notions.

PDF icon nunez2015parametric.pdf (342.55 KB)
N. Nomikos, et al., "Relay Selection for Secure 5G Green Communications",
Telecommunication Systems , vol. 59, issue 1, Springer US, pp. 169-187, 05/2015. DOI (I.F.: 0.822)More..

Abstract

In this article, we present relay selection policies in applications with secrecy requirements which are of interest in the fifth generation (5G) of wireless networks. More specifically, we provide a classification of relays based on their distinct communication attributes, such as processing, multiple antennas, storage, channel estimation, density and security level. In addition, we discuss the level of efficiency exhibited by each relay class, regarding their impact in delay-critical applications and green communications applications, while aiming at a specific security level at the physical layer. Then, relay selection policies are proposed taking into consideration the goals set by each application. Numerical evaluation of the proposed policies in terms of the average secrecy rate, average delay and power reduction show improved performance compared to other state-of-the-art solutions. 

Impact Factor: 0.822
Journal Citation Reports® Science Edition (Thomson Reuters, 2015)

A. Nieto, "Evaluation of Dynamic Instantiation in CPRM-based Systems",
9th International Conference on Risk and Security of Internet and Systems (CRiSIS'14), vol. 8924, Springer, pp. 52-66, 2014. DOI More..

Abstract

Context-based Parametric Relationship Models (CPRMs) reduce the complexity of working with various numbers of parameters and dependencies, by adding particular contexts to the final scheme when it is required, dynamically. In this paper the cost of including new information in CPRM is properly analysed, considering the information in the parametric trees defined for the parameters in the CPRM-based system. Some strategies for mitigating the cost of the instantiation process are proposed.

 

A. Nieto, R. Roman, and J. Lopez, "Testigo digital: delegación vinculante de evidencias electrónicas para escenarios IoT",
II Jornadas Nacionales de Investigación en Ciberseguridad (JNIC 2016), pp. 109-116, 06/2016. More..

Abstract

En un mundo en el que los usuarios dependen cada vez más de sus dispositivos, éstos almacenan gran cantidad de datos y son una fuente muy valiosa de información sobre su entorno. Sin embargo, la heterogeneidad y la densidad de los objetos conectados, características propias de la Internet de las Cosas (IoT), sirven de velo para ocultar conductas maliciosas que afectan a estos dispositivos, sin que quede rastro de tales acciones. En este artículo definimos el concepto de testigo digital: funcionalidad que permitirá a los dispositivos personales y otros objetos colaborar para implementar una cadena de custodia digital en la IoT. El fin perseguido es ofrecer soluciones que mitiguen los efectos de la ciberdelincuencia, amparándose en la colaboración de los dispositivos con arquitecturas de seguridad embebidas para alertar de conductas maliciosas, y dejar constancia de éstas.

PDF icon 1578.pdf (2.04 MB)
A. Nieto, R. Rios, and J. Lopez, "A Methodology for Privacy-Aware IoT-Forensics",
16th IEEE International Conference On Trust, Security And Privacy In Computing And Communications (TrustCom 2017), IEEE, pp. 626-633, 08/2017. DOI More..

Abstract

The Internet of Things (IoT) brings new challenges to digital forensics. Given the number and heterogeneity of devices in such scenarios, it bring extremely difficult to carry out investigations without the cooperation of individuals. Even if they are not directly involved in the offense, their devices can yield digital evidence that might provide useful clarification in an investigation. However, when providing such evidence they may leak sensitive personal information. This paper proposes PRoFIT; a new model for IoT-forensics that takes privacy into consideration by incorporating the requirements of ISO/IEC 29100:2011 throughout the investigation life cycle. PRoFIT is intended to lay the groundwork for the voluntary cooperation of individuals in cyber crime investigations.

PDF icon 1652.pdf (517.19 KB)
A. Nieto, and J. Lopez, "Security and QoS tradeoffs: towards a FI perspective",
Advanced Information Networking and Applications Workshops (WAINA), 2012 26th International Conference on, IEEE, pp. 745-750, 03/2012. DOI More..

Abstract

 Motivated by the growing convergence of diverse types of networks and the raise of new concepts such as Future Internet (FI), in this paper we present an analysis of current research on the development of security mechanisms in a tradeoff with Quality of Service (QoS) mechanisms. More precisely, we pay attention to the Security and QoS problems in resource-constrained networks that are candidates to be an important part of the FI due to their proximity to the user or because of their contribution to the information society. We analyse the current state of the research on security and QoS in the integration of sensors, MANET and cellular networks, with the aim of providing a critical point of view, allowing us to assess whether it is possible that such integration of networks is both secure and efficient.

PDF icon Nieto2012b.pdf (1.32 MB)
A. Nieto, A. Acien, and J. Lopez, "Capture the RAT: Proximity-based Attacks in 5G using the Routine Activity Theory",
The 16th IEEE International Conference on Dependable, Autonomic and Secure Computing (DASC 2018), IEEE, pp. 520-527, 08/2018. DOI More..

Abstract

The fifth generation of cellular networks (5G) will enable different use cases where security will be more critical than ever before (e.g. autonomous vehicles and critical IoT devices). Unfortunately, the new networks are being built on the certainty that security problems can not be solved in the short term. Far from reinventing the wheel, one of our goals is to allow security software developers to implement and test their reactive solutions for the capillary network of 5G devices. Therefore, in this paper a solution for analysing proximity-based attacks in 5G environments is modelled and tested using OMNET++. The solution, named CRAT, is able to decouple the security analysis from the hardware of the device with the aim to extend the analysis of proximity-based attacks to different use-cases in 5G. We follow a high-level approach, in which the devices can take the role of victim, offender and guardian following the principles of the routine activity theory. 

PDF icon CRAT2018.pdf (660.3 KB)
A. Nieto, and J. Lopez, "Security and QoS Tradeoff Recommendation System (SQT-RS) for Dynamic Assessing CPRM-based Systems",
10th ACM International Symposium on QoS and Security for Wireless and Mobile Networks (Q2SWinet'14), ACM, pp. 25-32, 09/2014. DOI More..

Abstract

Context-based Parametric Relationship Models (CPRM) define complex dependencies between different types of parameters. In particular, Security and QoS relationships, that may occur at different levels of abstraction, are easily identified using CPRM. However, the growing number of parameters and relationships, typically due to the heterogeneous scenarios of future networks, increase the complexity of the final diagrams used in the analysis, and makes the current solution for assessing Security and QoS tradeoff (SQT) impractical for untrained users. In this paper, we define a recommendation system based on contextual parametric relationships in accordance with the definition of CPRM. The inputs for the system are generated dynamically based on the context provided by CPRM-based systems.

 

PDF icon 932.pdf (626.17 KB)
A. Nieto, and R. Rios, "Requisitos y soluciones de privacidad para la testificación digital",
III Jornadas Nacionales de Investigación en Ciberseguridad (JNIC 2017), vol. Actas del JNIC 2017, Servicio de Publicaciones de la URJC, pp. 51-58, 2017. More..
PDF icon 1648.pdf (1.2 MB)
A. Nieto, and J. Lopez, "Security and QoS relationships in Mobile Platforms",
The 4th FTRA International Conference on Computer Science and its Applications (CSA 2012), Lecture Notes in Electrical Engineering 203, Springer Netherlands, pp. 13-21, 2012. DOI More..

Abstract

Mobile platforms are becoming a fundamental part of the user’s daily life. The human-device relationship converts the devices in a repository of personal data that may be stolen or modified by malicious users. Moreover, wireless capabilities open the door to several malicious devices, and mobility represents an added difficulty in the detection of malicious behavior and in the prevention of the same. Furthermore, smartphones are subject to quality of service (QoS) restrictions, due to the user needs for multimedia applications and, in general, the need to be always-on. However, Security and QoS requirements are largely confronted and the mobility and heterogeneous paradigm on the Future Internet makes its coexistence even more difficult, posing new challenges to overcome. We analyze the principal challenges related with Security and QoS tradeoffs in mobile platforms. As a result of our analysis we provide parametric relationships between security and QoS parameters focused on mobile platforms.

PDF icon Nieto2012c.pdf (1.4 MB)
A. Nieto, R. Roman, and J. Lopez, "Testigo digital: procedimientos y dispositivos para la gestión segura de evidencias electrónicas con credenciales vinculantes",
España, C. Autón./Reg. de explotación: Andalucía, Invention Patent, vol. P201500764, G06F 21/00, 10/2015.
A. Nieto, R. Roman, and J. Lopez, "Digital Witness: Digital Evidence Management Framework for the Internet of Things",
ERCIM News, no. 106, ERCIM EEIG, pp. 9-9, 07/2016.
A. Nieto, and J. Lopez, "A Model for the Analysis of QoS and Security Tradeoff in Mobile Platforms",
Mobile Networks and Applications (MONET) Journal, vol. 19, issue 1, Springer US, pp. 64-78, 02/2014. DOI (I.F.: 1.045)More..

Abstract

Today, mobile platforms are multimedia devices that provide different types of traffic with the consequent particular performance demands and, besides, security concerns (e.g. privacy). However, Security and QoS requirements quite often conflict to a large degree; the mobility and heterogeneous paradigm of the Future Internet makes coexistence even more difficult, posing new challenges to overcome. Probably, one of the main challenges is to identify the specific reasons why Security and QoS mechanisms are so related to each other. In this paper, we present a Parametric Relationship Model (PRM) to identify the Security and QoS dependencies, and to elaborate on the Security and QoS tradeoff. In particular, we perform an analysis that focus on the mobile platform environment and, consequently, also considers subjective parameters such user’s experience, that is crucial for increasing the usability of new solutions in the Future Internet. The final aim of our contribution is to facilitate the development of secure and efficient services for mobile platforms.

Impact Factor: 1.045
Journal Citation Reports® Science Edition (Thomson Reuters, 2014)

PDF icon nieto2013mone.pdf (666.18 KB)
A. Nieto, and J. Lopez, "Herramienta para la Compensación de Parámetros de QoS y Seguridad",
XIII Reunión Española sobre Criptología y Seguridad de la Información (RECSI 2014), pp. 303-308, 09/2014. More..

Abstract

El análisis conjunto de mecanismos de seguridad y QoS es esencial para las redes heterogéneas donde diversos dispositivos pueden coexistir en entornos dinámicos. En concreto, los dispositivos no siempre pueden ser conocidos, por lo que diferentes requisitos y mecanismos pueden surgir para el análisis. En este artículo, proponemos una herramienta para facilitar la configuración de entornos basada en el análisis paramétrico de dependencias, tomando como base de conocimiento un conjunto de parámetros de seguridad y QoS. Esta forma de análisis de parámetros a alto nivel permite considerar las dependencias y la compensación entre mecanismos con independencia del sistema de información subyacente. Posibilita por tanto evaluar el impacto que tales mecanismos, y otros definidos acorde al modelo, tienen sobre un sistema previo a su despliegue. 

PDF icon 909.pdf (470.04 KB)
A. Nieto, "Becoming JUDAS: Correlating Users and Devices during a Digital Investigation",
IEEE Transactions on Information Forensics & Security, vol. 15, IEEE, pp. 3325-3334, 17/04/2020. DOI (I.F.: 6.013)More..

Abstract

One of the biggest challenges in IoT-forensics is the analysis and correlation of heterogeneous digital evidence, to enable an effective understanding of complex scenarios. This paper defines a methodology for extracting unique objects (e.g., representing users or devices) from the files of a case, defining the context of the digital investigation and increasing the knowledge progressively, using additional files from the case (e.g. network captures). The solution includes external searches using open source intelligence (OSINT) sources when needed. In order to illustrate this approach, the proposed methodology is implemented in the JSON Users and Devices analysis (JUDAS) tool, which is able to generate the context from JSON files, complete it, and show the whole context using dynamic graphs. The approach is validated using the files in an IoT-Forensic digital investigation where an important set of potential digital evidence extracted from Amazon’s Alexa Cloud is analysed.

Impact Factor: 6.013
Journal Citation Reports® Science Edition (Thomson Reuters, 2019)

PDF icon JUDAS2020.pdf (9.25 MB)
A. Nieto, N. Nomikos, J. Lopez, and C. Skianis, "Dynamic Knowledge-based Analysis in non-Secure 5G Green Environments using Contextual Data",
IEEE Systems Journal, vol. 11, issue 4, no. 99, IEEE, pp. 2479-2489, 12/2017. DOI (I.F.: 4.337)More..

Abstract

The growing number of parameters in heteroge- neous networks, as is the case of the fifth generation (5G) Green networks, greatly complicates the analysis of the Security and Quality of Service Tradeoff (SQT). However, studying these types of relationships is crucial in Future Internet scenarios to prevent potential points of failure and to enhance the use of limited resources, increasing the user’s experience. Therefore, it is fundamental to provide tools and models for training, so that the users understand these dependencies and solve them prior to deploying new solutions. In this paper, a Recommendation System for SQT (SQT-RS) is deployed in 5G Green systems, considering the particular case of relay networks and the impact of eavesdropping and jamming contexts on the models generated by the user, aided by SQT-RS. With this goal in mind, we provide a component for the user to automatically select specific contexts based on 5G Green capabilities. 

Impact Factor: 4.337
Journal Citation Reports® Science Edition (Thomson Reuters, 2017)

PDF icon NietNLS15.pdf (1.13 MB)
A. Nieto, "An Overview of Proactive Forensic Solutions and its Applicability to 5G",
IEEE 5G World Forum (5GWF), IEEE, pp. 191-196, 07/2018. DOI More..

Abstract

This article analyses the state of the art of proactive forensic solutions and highlights the importance of preparing the 5G ecosystem to serve digital forensic purposes. The analysis considers the current 5G threat landscape from the ENISA report, and discusses how some of the attacks could be mitigated using proactive forensic mechanisms. In addition, the requirements for deploying proactive forensic solutions in 5G are classified, and analysed based on the specific threats against 5G. 

PDF icon Nieto5GWF.pdf (142.87 KB)
A. Nieto, R. Rios, and J. Lopez, "PRoFIT: modelo forense-IoT con integración de requisitos de privacidad",
XIII Jornadas de Ingeniería Telemática (JITEL 2017), vol. Libro de actas, Editorial Universitat Politècnica de València, pp. 302-309, 01/2018, 2017. DOI More..
PDF icon 1655.pdf (456.17 KB)
A. Nieto, and J. Lopez, "A Context-based Parametric Relationship Model (CPRM) to Measure the Security and QoS tradeoff in Configurable Environments",
IEEE International Conference on Communications (ICC'14), IEEE Communications Society, pp. 755-760, 06/2014. DOI More..

Abstract

Heterogeneity of future networks requires the use of extensible models to understand the Security and QoS tradeoff. We believe that a good starting point is to analyze the Security and QoS tradeoff from a parametric point of view and, for this reason, in a previous paper, we defined the Parametric Rela- tionship Model (PRM) to define relationships between Security and QoS parameters. In this paper, we extend that approach in order to change the behaviour of the model so that different contexts in the same system are considered; that is, to provide a Context-based Parametric Relationship Model (CPRM). The final aim is to provide useful tools for system administrators in order to help them deal with Security and QoS tradeoff issues in the configuration of the environment. 

PDF icon 431.pdf (1.12 MB)
A. Nieto, and R. Rios, "Cybersecurity Profiles based on Human-Centric IoT Devices",
Human-centric Computing and Information Sciences, vol. 9, no. 1, Springer, pp. 1-23, 2019. DOI (I.F.: 3.7)More..
Impact Factor: 3.7
Journal Citation Reports® Science Edition (Thomson Reuters, 2019)

PDF icon HFNR2019.pdf (2.92 MB)
A. Nieto, and J. Lopez, "Contextualising Heterogeneous Information in Unified Communications with Security Restrictions",
Computer Communications, vol. 68, Elsevier, pp. 33-46, 09/2015. DOI (I.F.: 2.099)More..

Abstract

The lack of abstraction in a growing semantic, virtual and abstract world poses new challenges for assessing security and QoS tradeoffs. For example, in Future Internet scenarios, where Unified Communications (UC) will take place, being able to predict the final devices that will form the network is not always possible. Without this information the analysis of the security and QoS tradeoff can only be based on partial information to be completed when more information about the environment is available. In this paper, we extend the description of context-based parametric relationship model, providing a tool for assessing the security and QoS tradeoff (SQT) based on interchangeable contexts. Our approach is able to use the heterogeneous information produced by scenarios where UC is present.

Impact Factor: 2.099
Journal Citation Reports® Science Edition (Thomson Reuters, 2015)

PDF icon NL-COMCOM15.pdf (2 MB)
A. Nieto, R. Roman, and J. Lopez, "Testificación Digital",
Revista SIC, vol. 122, Ediciones CODA, pp. 94-98, Nov 2016. More..

Abstract

El creciente número de dispositivos interconectados trae consigo problemas de seguridad bien conocidos; por ejemplo, aquellos debidos a las vulnerabilidades en protocolos muy diversos –muchos de ellos propietarios– y al factor de error humano introducido por los usuarios. Sin embargo, cabe preguntarse cómo podemos usar el despliegue de tales dispositivos en beneficio de la ciberseguridad. En el proyecto IoTest se está desarrollando una solución, el Testigo Digital, que permitirá a los dispositivos personales con arquitectura de seguridad embebida reaccionar ante ataques virtuales, protegiéndonos de los ciberataques emergentes.

PDF icon nrlSIC16.pdf (476.98 KB)
A. Nieto, and G. Fernandez, "Sistema Colaborativo de Detección y Reacción ante Intrusiones basado en Intel vPro",
XII Reunión Española sobre Criptología y Seguridad de la Información (RECSI 2012), pp. 45-50, Sep 2012. More..

Abstract

En este trabajo proponemos una plataforma para el desarrollo de un sistema colaborativo para la detección y reacción ante intrusiones, empleando como base las tecnologías presentes en Intel vPro. La solución presentada está dirigida a solventar la necesidad de implantación de nuevas tecnologías que posibiliten la reacción ante ataques, independientemente del sistema operativo usado. Con este fin, en este trabajo abordamos tres puntos fundamentales: la detección de intrusiones colaborativa, la respuesta automática de los nodos ante la detección de una intrusión y el uso de herramientas que posibiliten asegurar la confianza en un nodo. En un sistema colaborativo como el que se propone aquí, un aspecto clave para la seguridad es la protección de las comunicaciones entre los mecanismos de detección y reacción frente a intrusiones. La modificación o el simple acceso a los datos intercambiados por tales sistemas supone un grave riesgo para la seguridad del entorno. Como resultado hemos desarrollado un prototipo preliminar para probar la solución propuesta en un escenario de ataque real.

PDF icon NF_RECSI12.pdf (534.44 KB)
A. Nieto, A. Acien, and G. Fernandez, "Crowdsourcing analysis in 5G IoT: Cybersecurity Threats and Mitigation",
Mobile Networks and Applications (MONET), Springer US, pp. 881-889, 10/2018. DOI (I.F.: 2.39)More..

Abstract

Crowdsourcing can be a powerful weapon against cyberattacks in 5G networks. In this paper we analyse this idea in detail, starting from the use cases in crowdsourcing focused on security, and highlighting those areas of a 5G ecosystem where crowdsourcing could be used to mitigate local and remote attacks, as well as to discourage criminal activities and cybercriminal behaviour. We pay particular attention to the capillary network, where an infinite number of IoT objects coexist. The analysis is made considering the different participants in a 5G IoT ecosystem.

Impact Factor: 2.39
Journal Citation Reports® Science Edition (Thomson Reuters, 2018)

PDF icon NAFMONET2018.pdf (1.04 MB)
A. Nieto, R. Roman, and J. Lopez, "Arquitectura funcional para la cadena de custodia digital en objetos de la IoT",
XIV Reunión Española sobre Criptología y Seguridad de la Información, pp. 168-173, 10/2016. More..

Abstract

En la Internet de los Objetos (IoT, por sus siglas en inglés), los ataques pueden ser perpetrados desde dispositivos que enmascaran su rastro ayudándose de la densidad de objetos y usuarios. Actualmente la idea de que los dispositivos de usuario almacenan evidencias que pueden ser muy valiosas para frenar ataques es bien conocida. Sin embargo, la colaboración de éstos para denunciar posibles abusos telemáticos aún está por definir. Los testigos digitales son dispositivos concebidos para definir la participación de dispositivos de usuario en una cadena de custodia digital. La idea es que las evidencias se generan, almacenan y transfieren siguiendo los requisitos marcados por las normas actuales (p.ej. UNE 71505), pero respetando las restricciones en recursos de los dispositivos. En este artículo proponemos una arquitectura funcional para la implementación del concepto de testigo digital en dispositivos heterogéneos de la IoT.

PDF icon 1582.pdf (921.02 KB)
A. Nieto, R. Rios, and J. Lopez, "Digital Witness and Privacy in IoT: Anonymous Witnessing Approach",
16th IEEE International Conference On Trust, Security And Privacy In Computing And Communications (TrustCom 2017), IEEE, pp. 642-649, 08/2017. DOI More..

Abstract

The digital witness approach defines the collaboration between IoT devices - from wearables to vehicles - to provide digital evidence through a Digital Chain of Custody to an authorised entity. As one of the cores of the digital witness, binding credentials unequivocally identify the user behind the digital witness. The objective of this article is to perform a critical analysis of the digital witness approach from the perspective of privacy, and to propose solutions that help include some notions of privacy in the scheme (for those cases where it is possible). In addition, digital anonymous witnessing as a tradeoff mechanism between the original approach and privacy requirements is proposed. This is a clear challenge in this context given the restriction that the identities of the links in the digital chain of custody should be known. 

PDF icon 1654.pdf (1.44 MB)
A. Nieto, and J. Lopez, "Traffic Classifier for Heterogeneous and Cooperative Routing through Wireless Sensor Networks",
Advanced Information Networking and Applications Workshops (WAINA), 2012 26th International Conference on, IEEE, pp. 607-612, 03/2012. DOI More..

Abstract

 

Wireless Sensor Networks (WSN) are networks composed of autonomous devices manufactured to solve a specific problem, with limited computational capabilities and resource-constrained (e.g. limited battery). WSN are used to monitor physical or environmental conditions within an area (e.g. temperature, humidity). The popularity of the WSN is growing, precisely due to the wide range of sensors available. As a result, these networks are being deployed as part of several infrastructures. However, sensors are designed to collaborate only with sensors of the same type. In this sense, taking advantage of the heterogeneity of WSN in order to provide common services, like it is the case of routing, has not been sufficiently considered. For this reason, in this paper we propose a routing protocol based on traffic classification and role-assignment to enable heterogeneous WSN for cooperation. Our approach considers both QoS requirements and lifetime maximization to allow the coexistence of different applications in the heterogeneous network infrastructure.

 

PDF icon Nieto2012a.pdf (372.72 KB)
A. Nieto, R. Rios, and J. Lopez, "Privacy-Aware Digital Forensics",
Security and Privacy for Big Data, Cloud Computing and Applications, Lizhe Wang, Wei Ren, Raymoond Choo and Fatos Xhafa, The Institution of Engineering and Technology (IET) , 09/2019. More..
PDF icon 1777.pdf (4.48 MB)
A. Nieto, R. Roman, and J. Lopez, "Digital Witness: Safeguarding Digital Evidence by using Secure Architectures in Personal Devices",
IEEE Network, IEEE Communications Society, pp. 12-19, 2016. DOI (I.F.: 7.230)More..

Abstract

Personal devices contain electronic evidence associated with the behaviour of their owners and other devices in their environment, which can help clarify the facts of a cyber-crime scene. These devices are usually analysed as containers of proof. However, it is possible to harness the boom of personal devices to define the concept of digital witnesses, where personal devices are able to actively acquire, store, and transmit digital evidence to an authorised entity, reliably and securely. This article introduces this novel concept, providing a preliminary analysis on the management of digital evidence and the technologies that can be used to implement it with security guarantees in IoT environments. Moreover, the basic building blocks of a digital witness are defined.

Impact Factor: 7.230
Journal Citation Reports® Science Edition (Thomson Reuters, 2016)

PDF icon ieeenet16-nrl.pdf (1002.02 KB)
A. Nieto, and J. Lopez, "Analysis and Taxonomy of Security/QoS tradeoff solutions for the Future Internet",
Security and Communication Networks (SCN) Journal, vol. 7, issue 12, Wiley-Blackwell, pp. 2778-2803, 2013. DOI (I.F.: 0.433)More..

Abstract

Motivated by the growing convergence of diverse types of networks and the rise of concepts such as Future Internet (FI), in this paper we analyse the coexistence of security mechanisms and Quality of Service (QoS) mechanisms in resourceconstrained networks, that are relevant types of networks within the FI environment. More precisely, we analyse the current state of the research on security and QoS in the integration of Wireless Sensor Networks (WSNs), Mobile Ad-Hoc Networks (MANETs) and cellular networks. Furthermore, we propose a taxonomy to identify similarities among these technologies, as well as the requirements for network interconnection. As a result, we define a dependency-based model for the analysis of Security and QoS tradeoff, and also define a high-level integration architecture for networks in the FI setting. The final goal is to provide a critical point of view that allows to assess whether such an integration of networks can be both secure and efficient.

Impact Factor: 0.433
Journal Citation Reports® Science Edition (Thomson Reuters, 2013)

PDF icon nietoscn13.pdf (1.67 MB)
A. Nieto, R. Rios, and J. Lopez, "IoT-Forensics meets Privacy: Towards Cooperative Digital Investigations",
Sensors, vol. 18, issue 2, no. 492, MDPI, 02/2018. DOI (I.F.: 3.031)More..

Abstract

IoT-Forensics is a novel paradigm for the acquisition of electronic evidence whose operation is conditioned by the peculiarities of the Internet of Things (IoT) context. As a branch of computer forensics, this discipline respects the most basic forensic principles of preservation, traceability, documentation, and authorization. The digital witness approach also promotes such principles in the context of the IoT while allowing personal devices to cooperate in digital investigations by voluntarily providing electronic evidence to the authorities. However, this solution is highly dependent on the willingness of citizens to collaborate and they may be reluctant to do so if the sensitive information within their personal devices is not sufficiently protected when shared with the investigators. In this paper, we provide the digital witness approach with a methodology that enables citizens to share their data with some privacy guarantees. We apply the PRoFIT methodology, originally defined for IoT-Forensics environments, to the digital witness approach in order to unleash its full potential. Finally, we show the feasibility of a PRoFIT-compliant digital witness with two use cases.

Impact Factor: 3.031
Journal Citation Reports® Science Edition (Thomson Reuters, 2018)

PDF icon nrlSensors2018.pdf (14.4 MB)
P. Najera, and J. Lopez, "RFID: Technological Issues and Privacy Concerns",
Digital Privacy: Theory, Technologies, and Practices, A.. Acquisti, S. Gritzalis, C.. Lambrinoudakis, and S. De Capitan di Vimercati Eds., Auerbach Publications, pp. 285-306, December, 2007. More..
PDF icon Najera2007.pdf (137.2 KB)
P. Najera, R. Roman, and J. Lopez, "User-centric secure integration of personal RFID tags and sensor networks",
Security and Communication Networks, vol. 6, Wiley-Blackwell, pp. 1177–1197, Oct 2013. DOI (I.F.: 0.433)More..

Abstract

A personal network (PN) should enable the collaboration of user’s devices and services in a flexible, self-organizing and friendly manner. For such purpose, the PN must securely accommodate heterogeneous technologies with uneven computational and communication resources. In particular, personal RFID tags can enable seamless recognition of user’s context, provide user authentication and enable novel services enhancing the quality and quantity of data handled by the PN. However, the highly constrained features of common RFID tags and their passive role in the network highlights the need of an adequate secure communication model with personal tags which enables their participation as a member of the PN. In this paper, we present our concept of PN, with special emphasis on the role of RFID and sensor networks, and define a secure architecture for PNs including methods for the secure access to context-aware technologies from both local PN members and the Internet of Things. The PN architecture is designed to support differentiated security mechanisms to maximize the level of security for each type of personal device. Furthermore, we analyze which security solutions available in the literature can be adapted for our architecture, as well as the challenges and security mechanisms still necessary in the secure integration of personal tags.

Impact Factor: 0.433
Journal Citation Reports® Science Edition (Thomson Reuters, 2013)

P. Najera, R. Roman, and J. Lopez, "Acceso seguro a nodos RFID en una arquitectura de red personal",
X Jornadas de Ingeniería Telemática (JITEL 2011), K. Hackbarth, R. Agüero, and R. Sanz Eds., Universidad de Cantabria, pp. 104 - 111, 09/2011. More..

Abstract

El paradigma de red personal (PN) permitirá la interacción y colaboración del creciente abanico de dispositivos personales. Con tal fin la PN ha de integrar en su seno múltiples tecnologías heterogéneas con diversas capacidades computacionales y de comunicación de forma segura. En particular, la incorporación de la tecnología RFID en objetos personales conlleva múltiples riesgos de seguridad y privacidad que han suscitado un elevado interés de la comunidad investigadora en los últimos años. Más allá de su seguridad de forma aislada, su integración en la PN y la interacción de ésta con redes de área extensa como Internet of Things requieren una arquitectura de red personal adecuada para tal contexto. Este artículo proporciona los fundamentos de tal arquitectura segura incluyendo el análisis de aspectos como la incorporación e inicialización de las restringidas etiquetas RFID en la red personal, la autenticación tanto de miembros de la PN como de usuarios y servicios remotos en su acceso a las tecnologías de contexto, el control de las políticas de privacidad y el establecimiento de canales seguros de comunicación supervisados.

P. Najera, F. Moyano, and J. Lopez, "Secure Integration of RFID Technology in Personal Documentation for Seamless Identity Validation",
3rd Symposium of Ubiquitous Computing and Ambient Intelligence 2008, Advances in Soft Computing 51/2009, Springer, pp. 134-138, October, 2008. DOI More..

Abstract

Seamless human identification and authentication in the information system is a fundamental step towards the transparent interaction between the user and its context proposed in ambient intelligence. In this context, the IDENTICA project is aimed to the design and implementation of a distributed authentication platform based on biometrics (i.e. voice and facial image) and personal documentation. In this paper, we present our work in this project focused on the secure integration of RFID technology in personal documentation in order to provide seamless identity validation. Our actual work status, first results and future directions are described in detail.

PDF icon PNajera2009.pdf (37.61 KB)
P. Najera, F. Moyano, and J. Lopez, "Security Mechanisms and Access Control Infrastructure for e-Passports and General Purpose e-Documents",
Journal of Universal Computer Science, vol. 15, pp. 970-991, 2009. DOI (I.F.: 0.669)More..

Abstract

Traditional paper documents are not likely to disappear in the near future as they are present everywhere in daily life, however, paper-based documentation lacks the link with the digital world for agile and automated processing. At the same time it is prone to cloning, alteration and counterfeiting attacks. E-passport defined by ICAO and implemented in 45 countries is the most relevant case of hybrid documentation (i.e. paper format with electronic capabilities) to date, but, as the advantages of hybrid documentation are recognized more and more will undoubtedly appear. In this paper, we present the concept and security requirements of general-use e-documents, analyze the most comprehensive security solution (i.e. ePassport security mechanisms) and its suitability for general-purpose e-documentation. Finally, we propose alternatives for the weakest and less suitable protocol from ePassports: the BAC (Basic Access Control). In particular, an appropriate key management infrastructure for access control to document memory is discussed in conjunction with a prototype implementation.

Impact Factor: 0.669
Journal Citation Reports® Science Edition (Thomson Reuters, 2009)

PDF icon Najera2009.pdf (293.84 KB)
P. Najera, R. Roman, and J. Lopez, "Secure architecure for the integration of RFID and sensors in personal networks",
7th International Workshop on Security and Trust Management (STM’11), LNCS 7170, Springer, pp. 207-222, 2012. DOI More..

Abstract

The secure integration of RFID technology into the personal network paradigm, as a context-aware technology which complements body sensor networks, would provide notable benefits to applications and potential services of the PN. RFID security as an independent technology is reaching an adequate maturity level thanks to research in recent years; however, its integration into the PN model, interaction with other network resources, remote users and service providers requires a specific security analysis and a PN architecture prepared to support these resource-constrained pervasive technologies. This paper provides such PN architecture and analysis. Aspects such as the management of personal tags as members of the PN, the authentication and secure communication of PN nodes and remote users with the context-aware technologies, and the enforcement of security and privacy policies are discussed in the architecture.

PDF icon Najera_STM11.pdf (551.02 KB)
P. Najera, and J. Lopez, "Real-time Location and Inpatient Care Systems Based on Passive RFID",
Journal of Network and Computer Applications, vol. 34, Elsevier, pp. pp. 980-989, 2011. DOI (I.F.: 1.065)More..

Abstract

RFID technology meets identification and tracking requirements in healthcare environments with potential to speed up and increase reliability of involved processes. Due to this, high expectations for this integration have emerged, but hospital and medical centers interested in adoption of RFID technology require prior knowledge on how to squeeze RFID capabilities, real expectations and current challenges. In this paper, we show our lab tested solutions in two specific healthcare scenarios. On the one hand, we analyze the case of a medical equipment tracking system for healthcare facilities enabling both real-time location and theft prevention. Worth-noting aspects such as possible EMI interferences, technology selection and management of RFID data from hospital information system are analyzed. Lab testing of system reliability based on passive UHF RFID is provided for this case. On the other hand, we analyze and provide a solution for care and control of patients in a hospital based on passive HF RFID with the result of a fully functional demonstrator. Our prototype squeezes RFID features in order to provide a backup data source from patient’s wristband. It also provides an offline working mode aiming to increase application reliability under network fail down and therefore, improving patient’s safety. Considerations regarding lessons learned and challenges faced are exposed.

Impact Factor: 1.065
Journal Citation Reports® Science Edition (Thomson Reuters, 2011)

PDF icon Najera2010.pdf (241.66 KB)
P. Najera, and J. Lopez, "Aplicación de la Tecnología RFID a Entornos Sanitarios",
2nd International Workshop of Ubiquitous Computing & Ambient Intelligence (wUCAmI’06), University of Castilla La Mancha, pp. 83-95, November, 2006. More..

Abstract

La tecnología RFID, que permite la identificación única de cualquier ser u objeto sin necesidad de contacto ni línea de visión directa, se está adoptando ampliamente en todo tipo de campos al producir un salto cualitativo en la integración de la informática con el entorno. En este artículo se muestra su estado del arte y se afrontan dos soluciones orientadas a paliar las necesidades en entornos sanitarios. Por un lado, un sistema de seguimiento de dispositivos en el interior de un centro médico que permite su localización inmediata y la prevención de hurtos usando RFID pasivo UHF con un testeo de fiabilidad, y por otro, una solución de control y atención de pacientes ingresados en planta usando RFID pasivo HF obteniéndose un demostrador plenamente funcional

P. Najera, and A. Nieto, "Network Technologies",
Digital Home Networking, R. Carbou, E. Exposito, and R. Roman Eds., Wiley-ISTE, pp. 17 - 58, 2011.