Problem. The wide spread of computer technology as a means processing information has led to the informatization society and emergence fundamentally new technologies. Therefore, security should be taken care in advance when developing using such Today, well-being, sometimes life many people, depends on degree In modern society, an important problem is protection that become subject purchase sal...

2015 2 Acknowledgement In the name of Allah, the Most Merciful, the Most Beneficient Firstly, I would like to thank the Almighty Allah for granting me the opportunity to come to New Zealand and undertake this research work. I would especially like to thank my husband for being there by my side and providing constant support and encouragement all through. I would like to thank my supervisor, Dr....