This book is not for professional hackers.Here, hacking techniques that can be easily understood have been described. If you only have a home PC, you can test all the examples provided here. I have included many figures that are intuitively understandable rather than a litany of explanations. Therefore, it is possible to gain some practical experience while hacking, since I have only used examples that can actually be implemented. This book is therefore necessary for ordinary people who have a curiosity of hackers and are interested in computers.