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25Cooperative games with homogeneous groups of participantsTheory and Decision 79 (3): 451-461. 2015.We consider a class of games, which we call “groups’ games”, in which players are partitioned into classes within which players may be considered indistinguishable. We compute explicit formulas for some of the principal values restricted to these games. This is particularly useful for dealing with games with a large number of players where the usual formulas would be impractical to compute. We give several examples that illustrate how this idea may be applied to concrete situations.
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20Two proposals for group signature schemes based on number theory problemsLogic Journal of the IGPL 21 (4): 648-658. 2013.
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18Using the Spanish national identity card in social networksLogic Journal of the IGPL 28 (4): 519-530. 2020.The distinctive security features of the Spanish electronic national identity card, known as Documento Nacional de Identidad electrónico, allow us to propose the usage of this cryptographic smart card in an authentication framework that can be used during the registration and login phases of internet services where the validation of the user’s age and real identity are key elements, as it is the case for example of the so-called social networks. Using this mechanism with NFC-capable devices, the…Read more
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13Design and optimization of the input modules of a DPA toolboxLogic Journal of the IGPL 24 (1). 2016.
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13Comparing low and medium cost computer-based technologies suitable for cryptographic attacksLogic Journal of the IGPL 27 (2): 177-188. 2019.
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1Linear symmetric rankings for TU-gamesTheory and Decision 82 (4): 461-484. 2017.We define ranking as an equivalence relation on the set of power indices and study those that have a linear and symmetric representative. Moreover, we classify—or parametrize—those rankings that reward “positive” payoffs for “positive” participation. It is shown that these are in 1-1 correspondence with the points of the standard simplex. Moreover, this correspondence is convex. Finally, we contrast this classification with Saari–Sieberg’s approach via “positive” semi-values.
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