Ara es mostren els items 1-13 de 13

    • A fair and abuse-free contract signing protocol from Boneh-Boyen signature 

      Heidarvand, Somayed; Villar Santos, Jorge Luis (Springer Verlag, 2010)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A fair contract signing protocol is used to enable two mistrusted parties to exchange two signatures on a given contract, in such a way that either both of them get the other party’s signature, or none of them gets anything. ...
    • An algebraic framework for Diffie-Hellman assumptions 

      Escala Ribas, Alex; Herold, Gottfried; Kiltz, Eike; Ràfols Salvador, Carla; Villar Santos, Jorge Luis (2017-01)
      Article
      Accés obert
      We put forward a new algebraic framework to generalize and analyze Di e-Hellman like Decisional Assumptions which allows us to argue about security and applications by considering only algebraic properties. Our D`;k-MDDH ...
    • An algebraic framework for Diffie–Hellman assumptions 

      Escala Ribas, Alex; Herold, Gottfried; Kiltz, Eike; Ràfols Salvador, Carla; Villar Santos, Jorge Luis (2015-10-22)
      Article
      Accés obert
      We put forward a new algebraic framework to generalize and analyze Diffie-Hellman like Decisional Assumptions which allows us to argue about security and applications by considering only algebraic properties. Our D`,k-MDDH ...
    • Anonymous subscription schemes : a flexible fonstruction for on-line services access 

      González Vasco, Maria Isabel; Heidarvand, Somayed; Villar Santos, Jorge Luis (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In traditional e-cash systems, the tradeoff between anonymity and fraud-detection is solved by hiding the identity of the user into the e-coin, and providing an additional triggering mechanism that opens this identity in ...
    • CODES AND CRYPTOGRAPHY 

      Villar Santos, Jorge Luis (Universitat Politècnica de Catalunya, 2014-01-10)
      Examen
      Accés restringit a la comunitat UPC
    • Compartición de secretos en criptografía 

      Villar Santos, Jorge Luis; Padró Laimón, Carles; Sáez Moreno, Germán (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 1997)
      Article
      Accés obert
    • Equivalences and black-box separations of Matrix Diffie-Hellman problems 

      Villar Santos, Jorge Luis (2017-02)
      Article
      Accés obert
      In this paper we provide new algebraic tools to study the relationship between different Matrix Diffie-Hellman (MDDH) Problems, which are recently introduced as a natural generalization of the so-called Linear Problem. ...
    • Equivalences and Black-Box Separations of Matrix Diffie-Hellman Problems 

      Villar Santos, Jorge Luis (Springer, 2017)
      Comunicació de congrés
      Accés obert
      In this paper we provide new algebraic tools to study the relationship between different Matrix Diffie-Hellman (MDDH) Problems, which are recently introduced as a natural generalization of the so-called Linear Problem. ...
    • Matrix computational assumptions in multilinear groups 

      Morillo Bosch, M. Paz; Ràfols Salvador, Carla; Villar Santos, Jorge Luis (2015-04-20)
      Report de recerca
      Accés obert
      We put forward a new family of computational assumptions, the Kernel Matrix Di e- Hellman Assumption. Given some matrix A sampled from some distribution D `;k , the kernel as- sumption says that it is hard to nd \in the exponent
    • Métodos numéricos con MATLAB : aplicación a las telecomunicaciones 

      Villar Santos, Jorge Luis; Morillo Bosch, M. Paz (Edicions UPC, 2003)
      Llibre
      Accés restringit als usuaris de la UB, UAB, UPC, UPF, UdG, UdL, URV, UOC, BC, UVic, UJI, URL, UIC
      El contenido de este libro corresponde a una asignatura semestral de formación general sobre métodos numéricos en Ingeniería de Telecomunicación. La obra se estructura en tres partes. La primera contiene una introducción ...
    • Public verifiability from pairings in secret sharing schemes 

      Heidarvand, Somayed; Villar Santos, Jorge Luis (2009)
      Article
      Accés restringit per política de l'editorial
      In this paper we propose a new publicly verifiable secret sharing scheme using pairings with close relations to Shoenmakers’ scheme. This scheme is efficient, multiplicatively homomorphic and with unconditional verifiability ...
    • The Kernel Matrix Diffie-Hellman Assumption 

      Morillo Bosch, M. Paz; Ràfols Salvador, Carla; Villar Santos, Jorge Luis (2016-12)
      Article
      Accés obert
      We put forward a new family of computational assumptions, the Kernel Matrix Diffie-Hellman Assumption. Given some matrix A sampled from some distribution D, the kernel assumption says that it is hard to find “in the exponent” ...
    • The Kernel Matrix Diffie-Hellman assumption 

      Morillo Bosch, M. Paz; Ràfols Salvador, Carla; Villar Santos, Jorge Luis (Springer, 2016)
      Comunicació de congrés
      Accés obert
      We put forward a new family of computational assumptions, the Kernel Matrix Diffie-Hellman Assumption. Given some matrix A sampled from some distribution D, the kernel assumption says that it is hard to find “in the exponent” ...