The goal of this book is to help produce more highly skilled security professional so are dedicated to protecting against malicious hacking activity. It has been proven erand over again thatitis important tounder standone’se nemies, including theirtacs, skills, tools, and motivations.Corporation sandnation shave enemies that are very dicated and talented. We must work together to understand the enemies’ processes d procedures to ensure that we can properly thwart their destructive and malicious havior.

The authors of this book want to provide the readers with something we believe the dustry needs: a holistic review of ethical hacking that is responsible and truly ethical its intentions and material. This is why we are starting this book with a clear defini-n of what ethical hacking is and is not—something society is very confused about.We have updated thematerial from the first edition and have attempted to deliver the ost comprehensive and up-to-date assembly of techniques and procedures. Six new apters are presented and the other chapters have been updated. In Part I of this book we lay down the ground work of the necessary ethicsand expec-ions of a gray hat hacker.