Now showing items 21-40 of 49

    • Hierarchical categorisation of tags for delicious 

      Parra Arnau, Javier; Perego, Andrea; Ferrari, Elena; Forné Muñoz, Jorge; Rebollo Monedero, David (2012)
      Other
      Open Access
      In the scenario of social bookmarking, a user browsing the Web bookmarks web pages and assigns free-text labels (i.e., tags) to them according to their personal preferences. In this technical report, we approach one of ...
    • Hierarchical categorisation of web tags for Delicious 

      Parra Arnau, Javier; Perego, Andrea; Ferrari, Elena; Forné Muñoz, Jorge; Rebollo Monedero, David (2011-11-11)
      Research report
      Open Access
      In the scenario of social bookmarking, a user browsing the Web bookmarks web pages and assigns free-text labels (i.e., tags) to them according to their personal preferences. The benefits of social tagging are clear – tags ...
    • La publicación de trayectorias: un estudio sobre la protección de la privacidad 

      Guerra Balboa, Patricia; Miranda Pascual, Àlex; Parra Arnau, Javier; Forné Muñoz, Jorge; Strufe, Thorsten (Universidad de Cantabria, 2022)
      Conference report
      Open Access
      El analisis de las trayectorias encierra numerosas ´ promesas, desde mejoras en la gestion del tr ´ afico hasta recomen- ´ daciones de ruta, o incluso en el desarrollo de infraestructuras. Sin embargo, conocer los lugares ...
    • m-Eligibility with minimum counterfeits and deletions for privacy protection in continuous data publishing 

      Tobar Nicolau, Adrián; Parra Arnau, Javier; Forné Muñoz, Jorge; Pallarès Segarra, Esteve (2024-01-15)
      Article
      Open Access
      Continuous data publishing consists in the republication of updating microdata. The most relevant syntactic notions in continuous data publishing are based on m-invariance. This notion enforces that no user can be distinguished ...
    • Measuring online tracking and privacy risks on Ecuadorian websites 

      Estrada Jiménez, José Antonio; Rodríguez Hoyos, Ana Fernanda; Parra Arnau, Javier; Forné Muñoz, Jorge (2019)
      Conference lecture
      Open Access
      Online tracking has become a great enabler of massive surveillance so it is now a critical vector for threatening the privacy of users. Despite the benefits of online tracking for personalized advertising, the complexity ...
    • Measuring the privacy of user profiles in personalized information systems 

      Parra Arnau, Javier; Rebollo Monedero, David; Forné Muñoz, Jorge (Elsevier, 2014-04-01)
      Article
      Restricted access - publisher's policy
      Personalized information systems are information-filtering systems that endeavor to tailor information-exchange functionality to the specific interests of their users. The ability of these systems to profile users is, on ...
    • Mecanismo para evitar ataques por confabulación basados en code passing 

      Jáimez Moruno, Marc; Esparza Martín, Óscar; Hernández Gañán, Carlos; Parra Arnau, Javier (2009)
      Conference report
      Restricted access - publisher's policy
      Los agentes móviles son entidades software formadas por código, datos, itinerario y estado, que pueden migrar de host en host autónomamente ejecutando su código. A pesar de sus ventajas, los aspectos de seguridad restringen ...
    • Medición de la privacidad de perfiles de usuario mediante un add-on de navegador 

      Estrada, Jose; Rodríguez, Ana; Parra Arnau, Javier; Forné Muñoz, Jorge; Rebollo Monedero, David (2013)
      Conference lecture
      Restricted access - publisher's policy
      Actualmente, la monitorización de los usuarios en Internet es permanente, y la información obtenida en este proceso es de enorme interés para grandes compañías de publicidad e incluso gobiernos. Además, la gran cantidad ...
    • MOBILYTICS project 

      Parra Arnau, Javier (2023-05-11)
      Conference lecture
      Open Access
    • MyAdChoices: bringing transparency and control to online advertising 

      Parra Arnau, Javier; Achara, Jagdish Prasad; Castelluccia, Claude (2017-03)
      Article
      Open Access
      The intrusiveness and the increasing invasiveness of online advertising have, in the last few years, raised serious concerns regarding user privacy and Web usability. As a reaction to these concerns, we have witnessed the ...
    • Nuevo criterio para la estimación de información de estado de certificados en MANET 

      Muñoz Tapia, José Luis; Parra Arnau, Javier; Hernández Gañán, Carlos; Jáimez Moruno, Marc (Universidad Politécnica de Cartagena, 2009)
      Conference report
      Restricted access - publisher's policy
      In general, certificate status validation is a critical operation but it is particularly complex in Mobile Ad-hoc Networks (MANETs). MANET users require solutions to manage both the lack of fixed infrastructure inside ...
    • Nuevo criterio para la estimación de información de estado de certificados en MANET 

      Parra Arnau, Javier (Universitat Politècnica de Catalunya, 2009)
      Master thesis
      Open Access
      En general, la validación del estado de certificados es una operación crítica, que adquiere una mayor complejidad en las redes móviles ad-hoc (Mobile Ad-hoc Networks, MANETs). Los usuarios de las redes MANET precisan ...
    • On the cost-effectiveness of mass surveillance 

      Parra Arnau, Javier; Castelluccia, Claude (Institute of Electrical and Electronics Engineers (IEEE), 2018-08)
      Article
      Open Access
      In recent times, we have witnessed an increasing concern by governments and intelligence agencies to deploy mass-surveillance systems that help them fight terrorism. Although a government may be perfectly legitimate to do ...
    • On the measurement of privacy as an attacker's estimation error 

      Rebollo Monedero, David; Parra Arnau, Javier; Diaz, Claudia; Forné Muñoz, Jorge (2012)
      Article
      Open Access
      A wide variety of privacy metrics have been proposed in the literature to evaluate the level of protection offered by privacy enhancing-technologies. Most of these metrics are specific to concrete systems and adversarial ...
    • On the privacy–utility trade-off in differentially private hierarchical text classification 

      Wunderlich, Dominik; Bernau, Daniel; Aldà, Francesco; Parra Arnau, Javier; Strufe, Thorsten (Multidisciplinary Digital Publishing Institute, 2022-11-04)
      Article
      Open Access
      Hierarchical text classification consists of classifying text documents into a hierarchy of classes and sub-classes. Although Artificial Neural Networks have proved useful to perform this task, unfortunately, they can leak ...
    • On the regulation of personal data distribution in online advertising platforms 

      Estrada Jiménez, José Antonio; Parra Arnau, Javier; Rodríguez Hoyos, Ana Fernanda; Forné Muñoz, Jorge (Elsevier, 2019-03)
      Article
      Open Access
      Online tracking is the key enabling technology of modern online advertising. In the recently established model of real-time bidding (RTB), the web pages tracked by ad platforms are shared with advertising agencies (also ...
    • Online advertising: analysis of privacy threats and protection approaches 

      Estrada, José; Parra Arnau, Javier; Rodríguez Hoyos, Ana Fernanda; Forné Muñoz, Jorge (2016-12-27)
      Article
      Open Access
      Online advertising, the pillar of the “free” content on the Web, has revolutionized the marketing business in recent years by creating a myriad of new opportunities for advertisers to reach potential customers. The current ...
    • Optimized, direct sale of privacy in personal data marketplaces 

      Parra Arnau, Javier (2018-01)
      Article
      Open Access
      Very recently, we are witnessing the emergence of a number of start-ups that enables individuals to sell their private data directly to brokers and businesses. While this new paradigm may shift the balance of power between ...
    • Optimizing the design parameters of threshold pool mixes for anonymity and delay 

      Rebollo Monedero, David; Parra Arnau, Javier; Forné Muñoz, Jorge; Díaz Martínez, María Claudia (2014-07-04)
      Article
      Restricted access - publisher's policy
      The provision of content confidentiality via message encryption is by no means sufficient when facing the significant privacy risks present in online communications. Indeed, the privacy literature abounds with examples of ...
    • Pay-per-tracking: a collaborative masking model for web browsing 

      Parra Arnau, Javier (2017-04)
      Article
      Open Access
      Web tracking is the key enabling technology of modern online advertising and, at the same time, the source of serious privacy concerns. In recent years, we have witnessed the emergence of a variety of technologies whose ...