Recently, Wang et al. proposed a set of double auction protocols with full privacy protection based on distributed ElGamal encryption. Unfortunately, their protocols are expensive in computation, and are not robust in dealing with system malfunction or user misbehavior. In this paper, we propose a secure and practical double auction protocols based on a hybrid trust model, where computation loa...

PVSS stands for publicly verifiable secret sharing. In PVSS, a dealer shares a secret among multiple share holders. He encrypts the shares using the shareholders' encryption algorithms and publicly proves that the encrypted shares are valid. Most of the existing PVSS schemes do not employ an ElGamal encryption to encrypt the shares. Instead, they usually employ other encryption algorithms like ...

A non-interactive, simple and efficient publicly verifiable secret sharing (PVSS) is constructed based on the bilinear pairing on elliptic curves, which has all advantages of Schoenmakers’ PVSS in [15]. Moreover, in the scheme’s distribution of shares phase, only using bilinearity of bilinear paring, anybody can verify that the participants received whether correct shares without implementing i...

Publicly verifiable secret sharing (PVSS) allows not only shareholders themselves but also everyone verify the shares of a secret distributed by a dealer. It has a lot of electronic applications. In this paper, we propose a publicly verifiable member-join protocol for threshold signatures. In our proposal, a new member can join a PVSS scheme to share the secret only with the help of old shareho...

En este artículo presentamos una propuesta metodológica para el estudio de la historia del pensamiento político. Nuestro método tiene en cuenta como criterios interpretativos los textos, contextos y marcos que se insertan las producciones intelectuales autores realizan. Consideramos estos tres informativos nos permiten analizar e interpretar lo han querido transmitirnos con sus escritos. A modo...

In a series of engaging observations on colonialism and territorial conquest, Edward Said crafted the notion of “imaginative geography” to describe the ideological impulses of dominant groups seeking control of places and people.1 According to Said, imagined geography is a process initiated by groups with territorial ambitions who reinvent meanings about the landscapes they covet, and frame dis...

Este artículo se acerca a la literatura cubana del exilio y, en concreto, obra poética de las escritoras Nivaria Tejera (1929-2016) y Magali Alabau (1945). Tras plantearse un recorrido por diversas construcciones teóricas reflexiones torno esta temática, partir autores como María Zambrano o Edward Said, entre otros, el trabajo centra análisis dos textos poéticos cada una estas escritoras, indag...

Studies of gender balance in academic computer science are typically based on statistics on enrollment and graduation. Going beyond these coarse measures of gender participation, we conduct a fine-grained study of gender in the field of Natural Language Processing. We use topic models (Latent Dirichlet Allocation) to explore the research topics of men and women in the ACL Anthology Network. We ...