Exploració per autor "Farràs Ventura, Oriol"

Ara es mostren els items 1-13 de 13

    • A safety-critical, RISC-V SoC integrated and ASIC-ready classic McEliece accelerator 

      Kostalabros, Vatistas; Ribes González, Jordi; Farràs Ventura, Oriol; Moretó Planas, Miquel; Hernández Luz, Carles (Springer, 2024)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Security is an integral part of ensuring the integrity of safety-critical systems. Safety-critical systems with extremely long-lifespan, such as the ones employed in the space and automotive industry, need additional ...

    • A security model for randomization-based protected caches 

      Ribes González, Jordi; Farràs Ventura, Oriol; Hernández Luz, Carles; Kostalabros, Vatistas; Moretó Planas, Miquel (2022)
      Article
      Accés obert
      Cache side-channel attacks allow adversaries to learn sensitive information about co-running processes by using only access latency measures and cache contention. This vulnerability has been shown to lead to several ...

    • Common information, matroid representation, and secret sharing for matroid ports 

      Michael, Bamiloshin; Ben-Efraim, Aner; Farràs Ventura, Oriol; Padró Laimon, Carles (2020-09-28)
      Article
      Accés obert
      Linear information and rank inequalities as, for instance, Ingleton inequality, are useful tools in information theory and matroid theory. Even though many such inequalities have been found, it seems that most of them ...

    • Extending Brickell-Davenport theorem to non-perfect secret sharing schemes 

      Farràs Ventura, Oriol; Padró Laimon, Carles (2015-02)
      Article
      Accés obert
      One important result in secret sharing is the Brickell-Davenport Theorem: every ideal perfect secret sharing scheme de nes a matroid that is uniquely determined by the access structure. Even though a few attempts have been ...

    • HLS-based HW/SW co-design of the post-quantum classic McEliece cryptosystem 

      Kostalabros, Vatistas; Ribes González, Jordi; Farràs Ventura, Oriol; Moretó Planas, Miquel; Hernández Luz, Carles (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Text en actes de congrés
      Accés obert
      While quantum computers are rapidly becoming more powerful, the current cryptographic infrastructure is imminently threatened. In a preventive manner, the U.S. National Institute of Standards and Technology (NIST) has ...

    • Ideal hierarchical secret sharing schemes 

      Farràs Ventura, Oriol; Padró Laimon, Carles (Springer, 2010)
      Text en actes de congrés
      Accés obert
      Hierarchical secret sharing is among the most natural generalizations of threshold secret sharing, and it has attracted a lot of attention from the invention of secret sharing until nowadays. Several constructions of ideal ...

    • Ideal hierarchical secret sharing schemes 

      Farràs Ventura, Oriol; Padró Laimon, Carles (2012-01-24)
      Article
      Accés obert
      Hierarchical secret sharing is among the most natural generalizations of threshold secret sharing, and it has attracted a lot of attention since the invention of secret sharing until nowadays. Several constructions of ideal ...

    • Improving the linear programming technique in the search for lower bounds in secret sharing 

      Farràs Ventura, Oriol; Kaced, Tarik; Martín Mollevi, Sebastià; Padró Laimon, Carles (2020-11)
      Article
      Accés obert
      We present a new improvement in the linear programming technique to derive lower bounds on the information ratio of secret sharing schemes. We obtain non-Shannon-type bounds without using information inequalities explicitly. ...

    • Multipartite secret sharing schemes 

      Farràs Ventura, Oriol (Universitat Politècnica de Catalunya, 2010-07-27)
      Tesi
      Accés obert
      This thesis is dedicated to the study of secret sharing schemes, which are cryptographic methods to share information in a secure way. The topics that are considered in the thesis are two of the main open problems in secret ...

    • Natural generalizations of threshold secret sharing 

      Farràs Ventura, Oriol; Padró Laimon, Carles; Xing, Chaoping; Yang, An (2014-01-14)
      Article
      Accés obert
      We present new families of access structures that, similarly to the multilevel and compartmented access structures introduced in previous works, are natural generalizations of threshold secret sharing. Namely, they admit ...

    • On the information ratio of non-perfect secret sharing schemes 

      Farràs Ventura, Oriol; Hansen, Torben; Kaced, Tarik; Padró Laimon, Carles (2017-12-01)
      Article
      Accés obert
      A secret sharing scheme is non-perfect if some subsets of players that cannot recover the secret value have partial information about it. The information ratio of a secret sharing scheme is the ratio between the maximum ...

    • On the optimization of bipartite secret sharing schemes 

      Farràs Ventura, Oriol; Metcalf-Burton, Jessica Ruth; Padró Laimon, Carles; Vázquez González, Leonor (2012-05-01)
      Article
      Accés obert
      Optimizing the ratio between the maximum length of the shares and the length of the secret value in secret sharing schemes for general access structures is an extremely difficult and long-standing open problem. In this ...

    • Optimal non-perfect uniform secret sharing schemes 

      Farràs Ventura, Oriol; Hansen, Torben; Kaced, Tarik; Padró Laimon, Carles (Springer, 2014)
      Text en actes de congrés
      Accés obert
      A secret sharing scheme is non-perfect if some subsets of participants that cannot recover the secret value have partial information about it. The information ratio of a secret sharing scheme is the ratio between the maximum ...