The world of the internet is rife with hacking activities that involve illegal acts. White hat hackers work to prevent attacks on servers and networks. This book will teach you various knowledge and skills to become a hacker who utilizes specialized skills while adhering to laws and ethics. ■ Excerpt from the Preface This book delves into the question of "how to become a white hat hacker." The desire to become a white hat hacker is not limited to Japan; many young people overseas also aspire to be white hat hackers. In other words, it's a global theme. There are several books for aspiring hackers and beginners both domestically and internationally. However, many of them focus solely on technical aspects. There are very few books that address skill improvement methods or the mental aspects. With this background, the planning of this book was born. It is based on my own experiences, as well as the experiences of current white hat hackers and security experts. However, it is very difficult to discern between reproducible and coincidental elements in many success stories. Therefore, I have carefully examined them and extracted reproducible approaches. For this reason, it may seem like a common or safe approach, but it should be content for everyone. Although some extreme or unconventional methods are introduced, they are only a spice in this book. Instead of showing how to get a perfect score, this book introduces how to get an average score. Getting an average score may seem easy to achieve, but it is not easy to maintain it over a long period of life. It is not enough to take actions that result in a perfect score for a specific period. Learning is eternal, and you must maintain an average score all the time. By reading this book to the end, you should be able to get one answer to the question of "how to become a white hat hacker." CHAPTER 01 What is a White Hat Hacker? CHAPTER 02 What is Needed to be a White Hat Hacker? CHAPTER 03 Things to Know to Become a White Hat Hacker CHAPTER 04 Materials for Becoming a White Hat Hacker CHAPTER 05 Growth of a White Hat Hacker