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Browsing Articles (Departament de Tecnologies de la Informació i les Comunicacions) by Author "Daza, Vanesa"

Browsing Articles (Departament de Tecnologies de la Informació i les Comunicacions) by Author "Daza, Vanesa"

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  • Daza, Vanesa; Herranz, Javier; Morillo, Paz; Ràfols, Carla (Elsevier, 2008)
    In a threshold broadcast encryption scheme, a sender chooses (ad-hoc) a set of n receivers and a threshold t, and then encrypts a message by using the public keys of all the receivers, in such a way that the original ...
  • Bellalta, Boris; Daza, Vanesa; Oliver Riera, Miquel (Institute of Electrical and Electronics Engineers (IEEE), 2011)
    A queueing model for Multi-rate Multi-user MIMO systems is presented. The model is built upon the assumption that the probability distribution of available destinations among the buffered frames at the Base Station (BS) ...
  • Franzoni, Francesco; Salleras, Xavier; Daza, Vanesa (Springer, 2021)
    Over the past decade, the Bitcoin P2P network protocol has become a reference model for all modern cryptocurrencies. While nodes in this network are known, the connections among them are kept hidden, as it is commonly ...
  • Franzoni, Federico; Daza, Vanesa (Springer, 2022)
    The Bitcoin P2P network currently represents a reference benchmark for modern cryptocurrencies. Its underlying protocol defnes how transactions and blocks are distributed through all participating nodes. To protect user ...
  • Daza, Vanesa; Di Pietro, Roberto; Lombardi, Flavio; Signorini, Matteo (Elsevier, 2017)
    As services steadily migrate to the Cloud, the availability of an overarching identity framework has become a stringent need. Moreover, such an identity framework is now critical in the Internet of Things. To address this ...
  • Mazorra, Bruno; Adan, Victor; Daza, Vanesa (MDPI, 2022)
    Uniswap, as with other DEXs, has gained much attention this year because it is a non-custodial and publicly verifiable exchange that allows users to trade digital assets without trusted third parties. However, its simplicity ...
  • Sancho, Teresa; Daza, Vanesa (Universitat de Barcelona, 2014)
    Existen distintas estrategias metodológicas para el seguimiento y evaluación de los/nparticipantes en un MOOC. En este artículo se elabora y justifica una propuesta/npara el MOOC de álgebra básica, “Descodificando álgebra”, ...
  • Daza, Vanesa; Herranz, Javier; Sáez, Germán (Elsevier, 2009)
    Dutta and Mukhopadhyay have recently proposed some very efficient self-healing key distribution schemes with revocation. The parameters of these schemes contradict some results (lower bounds) presented by Blundo et al. In ...
  • Salleras, Xavier; Rovira, Sergi; Daza, Vanesa (MDPI, 2022)
    Nowadays, there are a plethora of services that are provided and paid for online, such as video streaming subscriptions, car-share, vehicle parking, purchasing tickets for events, etc. Online services usually issue tokens ...
  • Bellés-Muñoz, Marta; Baylina, Jordi; Daza, Vanesa; Muñoz-Tapia, José L. (Institute of Electrical and Electronics Engineers (IEEE), 2022)
    In this article, we present the software tools we have implemented to bring complex privacy technologies closer to developers and to facilitate the implementation of privacyenabled blockchain applications
  • Rawat, Abhimanyu; Daza, Vanesa; Signorini, Matteo (MDPI, 2022)
    An increased pattern of hidden Internet of Things (IoT) devices has been observed. Due to the increased number of security attacks, a large number of IoT devices are disappearing from the public internet. Operating blockchain ...
  • Cramer, Ronald; Daza, Vanesa; Gracia, Ignacio; Jiménez Urroz, Jorge; Leander, Gregor; Martí, Jaume, 1943-; Padró, Carles (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    Error-correcting codes and matroids have been widely used in the study of ordinary secret sharing schemes. In this paper, the connections between codes, matroids, and a special class of secret sharing schemes, namely, ...
  • Daza, Vanesa; Morillo, Paz; Ràfols, Carla (Elsevier, 2007)
    Identity-Based cryptography has been proposed in mobile ad-hoc networks (MANETs) to provide security. However, the figure of the Private Key Generator (PKG) is not adequate in the MANET setting, since it may not be reachable ...
  • Daza, Vanesa; Herranz, Javier; Sáez, Germán (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    In a distributed key distribution scheme, a set of servers helps a set of users in a group to securely obtain a common key. Security means that an adversary who corrupts some servers and some users has no information about ...
  • Bellalta, Boris; Faridi, Azadeh; Barceló Vicens, Jaume; Daza, Vanesa; Oliver Riera, Miquel (Elsevier, 2014)
    Multiuser Multi-Packet Transmission (MPT) from an Access Point (AP) equipped with multiple antennas to multiple single-antenna nodes can be achieved by exploiting the spatial dimension of the channel. In this paper we ...
  • Salleras, Xavier; Daza, Vanesa (Hindawi, 2020)
    5G communications proposed significant improvements over 4G in terms of efficiency and security. Among these novelties, the 5G network slicing seems to have a prominent role: deploy multiple virtual network slices, each ...
  • Franzoni, Federico; Daza, Vanesa (Institute of Electrical and Electronics Engineers (IEEE), 2022)
    Over the last decade, Bitcoin has revolutionized the global economic and technological landscape, inspiring a new generation of blockchain-based technologies. Its protocol is today among the most influential for cryptocurrencies ...
  • Daza, Vanesa; Domingo-Ferrer, Josep; Sebe, Francesc; Viejo, Alexandre (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    Vehicular ad hoc networks (VANETs) allow vehicle-to-vehicle communication and, in particular, vehicle-generated announcements. Provided that the trustworthiness of such announcements can be guaranteed, they can greatly ...
  • Bellés-Muñoz, Marta; Whitehat, Barry; Baylina, Jordi; Daza, Vanesa; Muñoz-Tapia, Jose Luis (MDPI, 2021)
    Circuit-based zero-knowledge proofs have arose as a solution to the implementation of privacy in blockchain applications, and to current scalability problems that blockchains suffer from. The most efficient circuit-based ...
  • Salleras, Xavier; Daza, Vanesa (MDPI, 2021)
    Zero-Knowledge Proofs (ZKPs) are cryptographic primitives allowing a party to prove to another party that the former knows some information while keeping it secret. Such a premise can lead to the development of numerous ...

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