This book is a compilation of research articles. For those working in the area of computer science, it could be eye-openers to a new system’s security dimension introduced along with its possible solutions. This could be a tool or an application (another layer) of security for computer systems. However, further works continue to enhance and strengthen systems and users’ protection. Looking from the positive perspective, it will provide readers with deeper understanding of keystroke dynamics and as to how soft bio metrics could be embedded inside the systems to further enhance the security features. There are other topics in this publication that students could rely on that would enrich their knowledge pertaining to Computer and Security Systems. Presumably, students from the engineering faculty may find that the articles contain in this book to be beneficial or at least be a useful extra reading or as references.