The emergence of information and communication technology was accompanied by an increased and dramatically increased use of computers and communications. The public and private sectors such as governments, financial institutions, telecommunications, transportation, retailers, energy sectors, education, healthcare, etc. depend to a large extent on cyberspace, and the outcome of economic growth and stability of any country depends on the availability of security .The campaign of cyber-attacks continues to spread in quantity and quality, after the remarkable success of the attacks carried out by cybercriminals . Therefore, there is an urgent need to secure cyberspace in order to ensure the growth of the country's economy and protect its sovereignty. From this principle, This book is producing a good beginning for the information security and cyber security.Whose this book forThis book for the information security and cyber security students university level , as well as any researcher interesting in the cyber security domain.