Recent Submissions

  • Attribute-based versions of Schnorr and ElGamal 

    Herranz Sotoca, Javier (2016-01)
    Article
    Restricted access - publisher's policy
    We design in this paper the first attribute-based cryptosystems that work in the classical discrete logarithm, pairing-free, setting. The attribute-based signature scheme can be seen as an extension of Schnorr signatures, ...
  • Secret sharing, rank inequalities, and information inequalities 

    Martín Mollevi, Sebastià; Padró Laimon, Carles; Yang, An (2016-01)
    Article
    Open Access
    Beimel and Orlov proved that all information inequalities on four or five variables, together with all information inequalities on more than five variables that are known to date, provide lower bounds on the size of the ...
  • Revisiting distance-based record linkage for privacy-preserving release of statistical datasets 

    Herranz Sotoca, Javier; Nin Guerrero, Jordi; Rodríguez, Pablo; Tassa, Tamir (Elsevier, 2015-07-17)
    Article
    Restricted access - publisher's policy
    Statistical Disclosure Control (SDC, for short) studies the problem of privacy-preserving data publishing in cases where the data is expected to be used for statistical analysis. An original dataset T containing sensitive ...
  • Vote validatability in Mix-Net-based eVoting 

    Bibiloni, Pedro; Escala Ribas, Alex; Morillo Bosch, M. Paz (2015)
    Article
    Restricted access - publisher's policy
    One way to build secure electronic voting systems is to use Mix-Nets, which break any correlation between voters and their votes. One of the characteristics of Mix-Net-based eVoting is that ballots are usually decrypted ...
  • Secure and efficient anonymization of distributed confidential databases 

    Herranz Sotoca, Javier; Nin Guerrero, Jordi (2014)
    Article
    Restricted access - publisher's policy
    Let us consider the following situation: t entities (e.g., hospitals) hold different databases containing different records for the same type of confidential (e.g., medical) data. They want to deliver a protected version ...
  • New results and applications for multi-secret sharing schemes 

    Herranz Sotoca, Javier; Ruiz Rodríguez, Alexandre; Sáez Moreno, Germán (2014-12-01)
    Article
    Open Access
    In a multi-secret sharing scheme (MSSS), different secrets are distributed among the players in some set , each one according to an access structure. The trivial solution to this problem is to run independent instances of ...
  • On the representability of the biuniform matroid 

    Ball, Simeon Michael; Padró Laimon, Carles; Weiner, Zsuzsa; Xing, Chaoping (2013-08-22)
    Article
    Open Access
    Every biuniform matroid is representable over all sufficiently large fields. But it is not known exactly over which finite fields they are representable, and the existence of efficient methods to find a representation for ...
  • Cropping Euler factors of modular L-functions 

    González Rovira, Josep; Jiménez Urroz, Jorge; Lario Loyo, Joan Carles (2013-09)
    Article
    Open Access
    According to the Birch and Swinnerton-Dyer conjectures, if A/Q is an abelian variety, then its L-function must capture a substantial part of the properties of A. The smallest number field L where A has all its endomorphisms ...
  • More hybrid and secure protection of statistical data sets 

    Herranz Sotoca, Javier; Nin Guerrero, Jordi; Solé Simó, Marc (IEEE Computer Society Publications, 2012-09)
    Article
    Restricted access - publisher's policy
    Different methods and paradigms to protect data sets containing sensitive statistical information have been proposed and studied. The idea is to publish a perturbed version of the data set that does not leak confidential ...
  • Kd-trees and the real disclosure risks of large statistical databases 

    Herranz Sotoca, Javier; Nin Guerrero, Jordi; Solé Simó, Marc (Elsevier, 2011)
    Article
    Restricted access - publisher's policy
    In data privacy, record linkage can be used as an estimator of the disclosure risk of protected data. To model the worst case scenario one normally attempts to link records from the original data to the protected data. ...

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