This book deals with the complex and often challenging topics of cybersecurity and cybercrimes. The expansion in the use of the internet and thus cyberspace has led to the exponential growth of threats, vulnerabilities and risks for users. Cyberspace has therefore become a sort of battlefield where, in addition to different interconnected computer systems, hardware and software devices are capable of rendering inefficient or destroying physical or virtual infrastructures. The complex reality of cyberspace, which is constantly evolving and expanding, requires the continuous adaptation of criminal law. The author emphasizes that the role of legislators remains essential for the need to update and/or develop legal rules aiming at regulating the activities that take place within cyberspace. This book provides useful insight for those interested in understanding the current issues related to cybercrimes and it clarifies the notion that cybersecurity is in its essence the activity of prevention, detection and finally intervention in the attacks that rotate within cyberspace, guaranteeing not only the protection of information but also of individuals.