In today's digital age, cybersecurity has become a critical aspect of everyday life. Cyber threats are becoming increasingly complex, and individuals and organizations risk being breached, having their data leaked, or being completely destroyed.

For those who may not have a technical background, understanding the fundamental principles of cybersecurity can be daunting. Our book is aimed at these individuals, as well as those who want to "refresh" their knowledge.

Our book provides an accessible, understandable introduction to the key concepts of cybersecurity, such as types of threats and ways to protect against them. By learning these fundamental principles, readers will be better equipped to protect themselves and their data online, which is increasingly important in a world where technology is an integral part of daily life.

This book serves as the educational manual for the University of the Aegean's Cyber Security Expert professional program, which is academically supervised by Thanasis Davalas and has been developed based on the requirements of lifelong adult education.