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Introduction

Throughout this book, we have looked at a variety of computer crimes. We have examined forensic techniques, laws, actual case studies, and preventative measures. In this chapter, we will examine some of the actual techniques that hackers might use to gain access to a system. It is important to realize that these techniques could be used to commit these acts, and we are providing them here so that investigators (either law enforcement or network administrators) will understand how the hackers work and be better able to stop them or catch them. Some colleges now offer courses in hacking techniques for this very reason. (One of the authors of this book, Chuck Easttom, teaches such courses.) The philosophy behind teaching such skills is that it is very difficult to catch the bad guys if you don’t know what they know. We have briefly touched on some of these issues in previous chapters. In this chapter, we will be discussing them in depth.

One chapter will not make you a skilled hacker. However, one chapter can definitely make you familiar with common hacking techniques. We will look at a sampling of techniques that are used in various phases of hacking. In each case, we will explain how the technique works and, if appropriate, why it works. This should give you a working understanding of what hackers do, and hopefully a better idea of how to prevent them from doing it to your system. It should also help law-enforcement officers improve their investigative approach by providing insight into how hackers work.


  

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