Enriching Information Security via Hybrid of New Expand Rivest Shamir Adleman and Data Encryption Standard Cryptosystem

Cryptography system gives security services ability to protect information from people who are authorized to use it. This research introduces elevated information security system via hybrid of new expand Rivest Shamir Adleman (RSA) and data encryption standard (DES) cryptosystem using appropriate standard lgorithms. An Expand Algorithm (ERSA) algorithm Key cryptosystem based on nth large prime number system was introduced. Then a hybrid between the Expand Algorithm (ERSA) with Data Encryption Standard (DES) was applied using four randomly selected variables, each generated from large factor of “N” prime numbers. The information undergoes a cypher text-decryption process which provides strong security and uphold high information confidentiality and integrity of data. Results showed that the use of ERSA and DES algorithm reduced the key generation period and its complexity analysis of encryption and decryption are stronger, unlike the application of traditional RSA algorithm

Alternative Approaches to the Equilibrium Properties of Hard-Sphere Liquids

An overview of some analytical approaches to the computation of the structural and thermodynamic properties of single component and multicomponent hard-sphere fluids is provided. For the structural properties, they yield a thermodynamically consistent formulation, thus improving and extending the known analytical results of the Percus–Yevick theory. Approximate expressions for the contact values of the radial distribution functions and the corresponding analytical equations of state are also discussed. Extensions of this methodology to related systems, such as sticky hard spheres and squarewell fluids, as well as its use in connection with the perturbation theory of fluids are briefly addressed.