To determine the objective aspects of trust and risk in the information security (ISec) and cybersecurity fields is a complex and contemporary challenge. How to study the trust and risk phenomenon in information security is currently an unanswered question in all science, without many practical answers. Our suspicious is that it would be necessary to use knowledge from various disciplines to study it, which produces complex answers, especially since there is a need to understand what is information, security and human behavioral aspects in interpersonal relations, among other undefined concepts, correlated in this context. The objective of this book is connect concepts around information security, promoting its practical application. In here, you will not find a reference guide of concepts, but reading it may be a first step in developing a very good conceptual line base to follow in your future information security studies.