Book Image

Learn Ethical Hacking from Scratch.

By : Zaid Sabih
5 (1)
Book Image

Learn Ethical Hacking from Scratch.

5 (1)
By: Zaid Sabih

Overview of this book

This book starts with the basics of ethical hacking, how to practice hacking safely and legally, and how to install and interact with Kali Linux and the Linux terminal. You will explore network hacking, where you will see how to test the security of wired and wireless networks. You’ll also learn how to crack the password for any Wi-Fi network (whether it uses WEP, WPA, or WPA2) and spy on the connected devices. Moving on, you will discover how to gain access to remote computer systems using client-side and server-side attacks. You will also get the hang of post-exploitation techniques, including remotely controlling and interacting with the systems that you compromised. Towards the end of the book, you will be able to pick up web application hacking techniques. You'll see how to discover, exploit, and prevent a number of website vulnerabilities, such as XSS and SQL injections. The attacks covered are practical techniques that work against real systems and are purely for educational purposes. At the end of each section, you will learn how to detect, prevent, and secure systems from these attacks.
Table of Contents (24 chapters)
22
Discovering Vulnerabilities Automatically Using OWASP ZAP

WEP theory

The first encryption that we will discuss is Wired Equivalent Privacy (WEP) encryption, because it's the oldest one, and also the easiest one to break. WEP encryption uses an algorithm called RC4; each packet is encrypted at the Access Point (AP), and then sent out into the air. Once the client receives it, the client will be able to decrypt the packet and read the information inside of it, since the client has the key. In short, the AP encrypts the packet and sends it, and the client receives and decrypts it. In the same way, when the client itself sends the packet, the client encrypts it and then sends it out, and the AP receives and decrypts it with a key.

Each packet that is sent out has a unique key stream. WEP ensures that the key stream is unique by using a 24-bit Initialization Vector (IV). The IV is a random number that is sent into each packet in plain...