Now showing items 1-8 of 8

  • Anonymous threshold signatures 

    Hlad Colic, Petar (Universitat Politècnica de Catalunya, 2018-07)
    Master thesis
    Open Access
    Aquest treball tenia l'objectiu de trobar un esquema de llindar de signatura an\`onima compacte. Tot i no haver-ne trobat cap, s'analitzen diverses solucions que s'acosten a l'objectiu publicades per altres autors i es ...
  • Ataque diferencial mediante inyección de un error en AES-128 

    Trayno, Vladlena (Universitat Politècnica de Catalunya, 2016)
    Master thesis (pre-Bologna period)
    Open Access
    This project has studied and analized an attack by injection of errors against the AES encryption scheme currently existing in literature. The AES symmetric cryptosystem is perhaps the most widely used today. The idea of ...
  • Contributions to secret sharing and other distributed cryptosystems 

    Ruiz Rodríguez, Alexandre (Universitat Politècnica de Catalunya, 2013-07-22)
    Doctoral thesis
    Open Access
    The present thesis deals with primitives related to the eld of distributed cryptography. First, we study signcryption schemes, which provide at the same time the functionalities of encryption and signature, where the ...
  • Homomorphic cryptosystems for electronic voting 

    Cusell Sánchez, Enric (Universitat Politècnica de Catalunya, 2014-01)
    Bachelor thesis
    Open Access
    This bachelor's degree thesis deals with homomorphic public-key cryptography, or in other words cryptosystems with special addition properties. Such cryptosystems are widely used in real life situations, for instance to ...
  • Optimizations in the computation of pairings and cryptographic applications 

    Sánchez Charles, David (Universitat Politècnica de Catalunya, 2013-07)
    Master thesis
    Open Access
    En la criptografía de clave pública actual el uso de curvas elípticas es cada vez más habitual debido a que ofrecen una seguridad similar a los ya utilizados cuerpos finitos, pero con unas claves más cortas. Por otra parte, ...
  • Post-Quantum cryptography: lattice-based encryption 

    Sanou Gozalo, Eduard (Universitat Politècnica de Catalunya, 2016-07-08)
    Master thesis
    Open Access
    Post-Quantum Cryptography has gained attention in the recent years from the research community due to the disastrous consequences that efficient quantum computers would have on current public-key cryptosystems. In this ...
  • Revocation in Anonymous Authetication Systems 

    Fueyo Pestaña, María Rosa (Universitat Politècnica de Catalunya, 2015-07-16)
    Master thesis (pre-Bologna period)
    Open Access
    An attribute-based signature with respect to a signing policy chosen by the signer, convinces the verifier that the signer sustains a subset of attributes satisfying that signing policy. The verifier must not obtain any ...
  • Revocation of users in RSA attribute-based signatures 

    Fueyo Pestaña, Maria Rosa (Universitat Politècnica de Catalunya, 2014-07)
    Bachelor thesis
    Open Access
    An attribute-based signature with respect to a signing policy chosen by the signer, convinces the verifer that the signer sustains a subset of attributes satisfying that signing policy. The verifier must not obtain any ...