AbstractsComputer Science

The importance of secure message communication along with a brief literature newlinesurvey has been presented in this thesis Various encryption and spread spectrum newlinemodulation techniques have been discussed Pseudo noise PN sequences with their properties and implementation have also been described Design and implementation of some novel circuits for secure and reliable message communication have been worked out and proposed in this thesis Hardware newlinemodules of the proposed techniques have been tested in the laboratory for their newlineviability Complexity of PN code sequences used for encryption as well as SS systems is newlineof vital importance in military as well as commercial applications In this thesis newlinetwo novel techniques for the generation of code sequences with enhanced code complexity have been presented Prototype hardware modules of the proposed schemes presented in this thesis have been developed for experimental investigation The thesis concludes with a discussion over the work done during the course of this research A bibliography of concerned literature consulted has also been presented%%%