Declaration

I declare that this research represents original work done by myself, and is hereby submitted in partial fulfilment of the requirements for the degree of Master of Information Technology (MIT) at the School of information and Technology, University of Pretoria. The works of other authors have been acknowledged and referenced accordingly in the research. Furthermore, the author obtained necessary authorization and consent to conduct this research. This work has not been submitted for any additional degree or diploma to any other institution. But, its portions were submitted for publication as presentations or journal papers with full acknowledgement of the authors (see Appendix E)