Password-Authenticated Key Exchange (PAKE) protocols allow parties to share secret keys in an authentic manner based on an easily memorizable password. Recently, Nam et al. showed that a provably secure three-party passwordbased authenticated key exchange protocol using Weil pairing by Wen et al. is vulnerable to a man-in-the-middle attack. In doing so, Nam et al. showed the flaws in the proof ...

â â  the present study attempts to investigate the urban hierarchy in iran between 1996-2006. the research method is content and statistical analysis. the necessity data were collected by documental method. in addition to the analysis and sorting of the data regarding the situation of iranian cities based on different models such as entropy ,ginny coefficients, urban concentration index, and ra...

Since the first password-based authenticated key exchange (PAKE) was proposed, it has enjoyed a considerable amount of interest from the cryptographic research community. To our best knowledge, most of proposed PAKEs based on Diffie-Hellman key exchange need some public information, such as generators of a finite cyclic group. However, in a client-server environment, not all servers use the sam...

Abstract: Let X,Y,B be three independent random variables such that X has the same distribution function as Y B. Assume that B is a beta random variable with positive parameters α, β and Y has distribution function H with H(0) = 0. Pakes and Navarro (2007) show under some mild conditions that the distribution function Hα,β of X determines H . Based on that result we derive in this paper a recur...

The random parameters logit model for aggregate data introduced by Berry, Levinsohn, and Pakes (1995) has been a driving force in empirical industrial organization for more than a decade. While these models are identified in theory, identification problems often occur in practice. In this paper we introduce a new set of readily available instruments that have the potential to substantially impr...

The presence of noise in compliance times may have a critical impact on the selection of new technological standards. A technically superior standard is not necessarily viable because an arbitrarily small amount of noise may render coordination on that standard impossible. The criterion for the viability of a standard is that the sum of “support ratios” of all players must be smaller than one, ...

this study investigated the rate of reference to iranian literature in psychological and psychiatric studies. for this aim, 45 empirical researched on psychological and psychiatric aspects of imposed iran-iraq war which were published from 1980 to 1996 were studied. 18.6% of their referenes were iranian literatures in the list of references, but only 21.3% of these articles used irainain litera...

In this paper we propose a simple framework based on rst-order logic, for the design and decomposition of abstract domains for static analysis. An assertion language is chosen that speciies the properties of interest, and abstract domains are deened to be suitably chosen sets of assertions. Composition and decomposition of abstract domains is facilitated by their logical speciication in rst-ord...