Authentication and Confidentiality is the main goal of the public key cryptosystems deal when communication takes place between both the parties. The mostly used cryptographic methods are broadly classified as symmetric and asymmetric. The DES comes under the category of symmetric key cryptosystem whereas RSA, NTRU[1] belongs to the category of asymmetric key cryptosystem. NTRU (Nth degree trun...

Article history: Received 12 July 2010 Received in revised form 5 May 2011 Accepted 12 May 2011 Available online 18 May 2011 Traditional credit risk models adopt the linear correlation as a measure of dependence and assume that credit losses are normally-distributed. However some studies have shown that credit losses are seldom normal and the linear correlation does not give accurate assessment...

We present local dependence conditions for stationary random fields under which the extremal index and the asymptotic distribution of the maximum M(n1,...,nd) can be calculated from the joint distribution of a finite number s1s2 of variables. keywords: Extremal index, local and long range dependence, random field.

This paper points out that there exists a unique optimal approximation of autocorrelation function of an asymptotically second-order selfsimilar process. A simple type of autocorrelation functions is used to explain the method of optimal solution and verify the long-range dependence of traffic in the view of optimal approximation. KeywordsModeling, long-range dependence

We study the development of conjunctive keyword searchable scheme which enables one to search encrypted documents by using more than one keyword. The notion of conjunctive keyword searching was presented by Golle et al. in 2004. However, their security model was constructed in a symmetric-key setting which is not applicable for the overall applications in the reality. So Park et al. extended Go...

In this paper we present several proofs on the extension of M. Riesz fractional integration and di¤erentiation to the contexts of spaces of homogeneous type and measure metric spaces with non-doubling measures. 1. Introduction, some de…nitions, and a basic lemma Professor M. Ash asked me to write a survey article on some of the results that Stephen Vági and I obtained in the nineties on fractio...

Recent empirical evidence highlights the importance of asymmetries in the distribution of asset returns in both their marginal behavior in terms of skewness and their dependence structure in that assets tend to be more highly correlated during bear markets than during market upturns. In this paper we develop a model that is able to address both features of the data based on the construction of ...

Introduction: Morphine withdrawal syndrome is mediated via several central and peripheral neurological pathways. In the present study we investigated the role of N-methyl-D aspartic acid (NMDA) glutamate receptor on naloxone-induced withdrawal syndrome in morphine-conditioned mice. Materials and Methods: We designed two separate experiments. In experiment one, 30 male NMRI mice were divide...

background and aim: it will be discussed about five mechanisms in relation to speech in noise perception; including neural encoding and decoding, centrifugal pathways, pitch perception, asymmetric sampling in time and cognitive skills. these mechanisms are related to each other and each is important to recognize speech in noise. in this article, we have tried to rely on the latest studies to de...