This project has been submitted as partial fulfillment towards the requirements of the M.Tech. / M.Sc. degrees in Computer Science, Utkal University.This project is indebted to the the School of Mathematics, Statistics and Computer Science, M.Tech. program, Utkal University, and Institute of Physics, Bhubaneshwar, for assistance. We would like to thank Prof. S. Padhy, M.Tech. course co-ordinator for his kind support.