In the modern world, perhaps the most commonly used device is the mobile phone. More and more businesses and users are using smartphones for communication, and organization and planning of their work. Such technologies are bringing about marked changes in the organization of information systems which places data at risk. This is because smartphones store and collect sensitive information that compromises the privacy and security of the individual as well as the intellectual property of the company. This makes mobile security an increasingly important aspect in mobile computing. As smartphones are a point of access to the Internet, they can also be attacked with malware. Ransomware, viruses and Trojans, and spyware are examples of malware. Many of the security threats can be managed through rootkit detectors, memory protection, file systems permissions mechanisms, antivirus and firewall, safeguards in network routing points, etc. The ever-growing need of advanced technology is the reason that has fueled the research in the field of mobile security in recent times. This book unfolds the innovative aspects of mobile security which will be crucial for the progress of this domain in the future. As this field is emerging at a rapid pace, the contents of this book will help the readers understand the modern concepts and applications of the subject.