Now showing items 1-11 of 11

    • A Construction for Providing Reusability to Mobile Phone-Based e-Tickets 

      Borges Llorens, Ricard; Sebé Feixas, Francesc (IEEE, 2020)
      Nowadays, the use of electronic tickets in public transport is a reality. Several mobile phone-based e-ticket systems have been proposed so far. Even so, very few of them include reusability in the sense that a single ...
    • A Digital Cash Paradigm with Valued and No-Valued e-Coins 

      Borges Llorens, Ricard; Sebé Feixas, Francesc (MDPI, 2021)
      Digital cash is a form of money that is stored digitally. Its main advantage when compared to traditional credit or debit cards is the possibility of carrying out anonymous transactions. Diverse digital cash paradigms have ...
    • A Privacy-Preserving Pay-by-Phone Parking System 

      Garra Oronich, Ricard; Martínez Rodríguez, Santi; Sebé Feixas, Francesc (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Most cities around the world require drivers to pay for the time they occupy a parking spot. In this way, drivers are encouraged to shorten parking time so that other drivers are given a reasonable chance of finding ...
    • A privacy-preserving reputation system with user rewards 

      Busom Figueres, Núria; Petrlic, R.; Sebé Feixas, Francesc; Sorge, C.; Valls Marsal, Magda (Elsevier, 2017)
      Reputation systems are useful to assess the trustworthiness of potential transaction partners, but also a potential threat to privacy since rating profiles reveal users’ preferences. Anonymous reputation systems resolve this ...
    • Elliptic Curve Array Ballots for Homomorphic Tallying Elections 

      Martínez Rodríguez, Santi; Cerveró Abelló, M. Àngels; Mateu Meseguer, Víctor; Miret, Josep M. (Josep Maria); Sebé Feixas, Francesc (Springer Verlag, 2015)
      Remote voting systems implementing the homomorphic tal- lying paradigm have proven to be the best option for elections with a small range of candidates. In this paper, we propose a new homomor- phic tallying remote ...
    • Endorsement deduction and ranking in social networks 

      Pérez Rosés, Hebert; Sebé Feixas, Francesc; Ribó i Balust, Josep M. (Josep Maria) (Elsevier, 2016)
      Some social networks, such as LinkedIn and ResearchGate, allow user endorsements for specific skills. In this way, for each skill we get a directed graph where the nodes correspond to users’ profiles and the arcs represent ...
    • Mobile terrestrial laser scanner applications in precision fruticulture/ horticulture and tools to extract information from canopy point clouds 

      Escolà i Agustí, Alexandre; Martínez Casasnovas, José Antonio; Rufat i Lamarca, Josep; Arnó Satorra, Jaume; Arbonés, Amadeu; Sebé Feixas, Francesc; Pascual Roca, Miquel; Gregorio López, Eduard; Rosell Polo, Joan Ramon (Springer Science+Business Media, 2017-01-01)
      LiDAR sensors are widely used in many areas and, in recent years, that includes agricultural tasks. In this work, a self-developed mobile terrestrial laser scanner based on a 2D light detection and ranging (LiDAR) sensor ...
    • Repairing an aggregation-based smart metering system 

      Garra Oronich, Ricard; Leibenger, Dominik; Miret, Josep M. (Josep Maria); Sebé Feixas, Francesc (Springer Berlin Heidelberg, 2019)
      Smart meters inform the electricity suppliers about the consumption of their clients in short intervals. Fine-grained electricity consumption information is highly sensitive as it has been proven to permit to infer people's ...
    • Secure many-to-one communications in wireless sensor networks 

      Viejo Galicia, Alexandre; Domingo i Ferrer, Josep; Sebé Feixas, Francesc; Castellà Roca, Jordi (Molecular Diversity Preservation International (MDPI), 2009)
      Wireless Sensor Networks (WSN) are formed by nodes with limited computational and power resources. WSNs are finding an increasing number of applications, both civilian and military, most of which require security for the ...
    • Synthetic generation of social network data with endorsements 

      Pérez Rosés, Hebert; Sebé Feixas, Francesc (Palgrave Macmillan, 2014)
      In many simulation studies involving networks there is the need to rely on a sample network to perform the simulation experiments. In many cases, real network data is not available due to privacy concerns. In that case we ...
    • Triangle randomization for social network data anonymization 

      Brankovic, Ljiljana; López Lorenzo, Ignacio; Miller, Mirka; Sebé Feixas, Francesc (Society of Mathematicians, Physicists and Astronomers of Slovenia; Institute of Mathematics, Physics, and Mechanics; University of Primorska (Slovenia), 2014-06-27)
      In order to protect privacy of social network participants, network graph data should be anonymised prior to its release. Most proposals in the literature aim to achieve $k$-anonymity under specific assumptions about the ...