As this decade comes to a closure, we are looking at, what we like to call, an industry 4.0. This era is expected to see radical changes in the way we work and live, due to huge leaps and advancements with technologies such as Blockchain and quantum computing. This calls for the new age workforce to be industry-ready, which essentially means an understanding of the core fields of cybersecurity, block chain, and quantum computing is becoming imperative. This book starts with a Primer on the “essentials of cybersecurity”. this part allows the reader to get comfortable with the concepts of cybersecurity that are needed to gain a deeper understanding of the concepts to follow.