Comparison of Public Key Cryptography in Different Security Level

Authors: Zarni Sann, Thi Thi Soe, Khaing Myat Nwe

Abstract- Information security is one of the key challenges in data communication. For secure information communication over public network, different cryptographic methods are applied. There have many public key cryptography systems and they have difference performance. This system proposes the performance of the three public key cryptography systems: RSA (Rivest Shamir Adelman), ElGamal and ECC (Elliptic Curve Cryptography) by comparing encryption and decryption messages. This paper presents the implementation and comparison of RSA, Elgamal and ECC for variable text files sizes. Our goal is to calculate encryption time, decryption time, and key size based on different file size for each algorithm to identify which algorithms outperforms others in term of evaluation parameters.

Keywords: Key generation, Encryption, Decryption, RSA, ElGamal, ECC

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Optimization of Leaf Spring Parameters Using Taguchi’s DoE

Authors: Dr. J. Kingston Barnabas

Abstract- The design of the leaf spring is the one of the important unit in automotive design. The leaf spring absorbs heavy vertical loads in order to give smooth and comfort ride to the passengers. In the present day, automobile industries have shown an interest to reduce the weight of vehicle components as people are showing interest to have the vehicle with very good mileage. The objective of this present work is to compare the deformation of modified model of leaf spring with conventional leaf spring. Modeling of Leaf Spring is performed with SOLIDWORKS and structural analysis of the leaf spring is carried out using ANSYS 18.1.The light commercial vehicle (TATA ACE) leaf spring is taken for the analysis. In this work, it is decided to vary various design parameters of the leaf spring and to analyze the effects of those parameters in deformation. The various parameters selected are materials, number of leaves and length of leaves. Each parameter is varied to three levels. As per L9 orthogonal array, the maximum deformation in the leaf spring is obtained from ANSYS analysis for nine test conditions. The best levels of selected leaf spring parameters for minimizing deformation is identified by using Taguchi’s Design of Experiments. Analysis of Variance is used to analyze the influence of selected parameters on deformation of leaf spring. The effect of individual parameters as well as interactions between the selected leaf spring parameters on the deformation is analyzed using regression analysis (both linear and non linear). Finally, experiment for validation has been carried out with obtained best levels of leaf spring design parameters and the value of deformation is obtained.

Keywords: Composite Leaf Spring, Deformation, Taguchi’s DoE, Regression Analysis, ANOVA.

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Soil characteristics and crop suitability of sandy soils in Jharkhand, India

Authors: Shipra Joseph, Sandhya Joseph