After studying this chapter you will be able to understand: What is network security? Hacking, history of hacking, who is hacker? Who is cracker? Why do crackers exist? Difference between hacker & cracker, which operating system hacker use.
Trang 1ProfessionalPracticesin Information Technology
HandBook
COMSATS Institute of Information
Technology
(Virtual Campus) Islamabad, Pakistan
Trang 2Lecture 17 Introduction to Hacking
17.1 What Is Network Security?
Security is much larger than just packets, firewalls, and hackers. Security includes:
– Policies and procedures
– Liabilities and laws
– Human behavior patterns
– Corporate security programs and implementation
– Technical aspects firewalls, intrusion detection systems, proxies, encryption, antivirus software, hacks, cracks, and attacks
Understanding hacking tools and how attacks are carried out is only one piece of the puzzle
17.2 Hacking
The process of attempting to gain or successfully gaining, unauthorized access to computer resources for the purpose of help or secure system is called hacking
History of Hacking
– 1966 – Robert Morris introduces the concept of safe hacking
– 1969 – Development in the field of hacking
Trang 3– 1990 – Electronic frontier foundation was founded.
– 1995 – Mark Andreessen & Eric release mosaic
Who is Hacker?
Hacker is not cybercriminal but he is the very intelligent person who uses his knowledge in constructive manner to secure system & never damage data. He knows all about the operating system & different holes in the system
Who is cracker?
– Person who enter into other’s system and violet the system, damage the data, create havoc is called cracker
– Cracker is cyber criminal
– They can be easily identified because their actions are malicious
Why do crackers exist?
– Crackers exist because human nature is just so, frequently driven by to destroy instead of create
– They are used for different purposes like for profit, some company use them for disabling the competitor company, for cracking credit card number
Difference between hacker & cracker
– Hacker’s programs to check integrity of other programs, thus when hackers create program it
Trang 4– They always do constructive work
– Crackers rarely make their own program instead, they steal tool, programs from others
– Crackers creates nothing & destroy much
Which operating system hacker use
– Sun
– Unix
– Microsoft
Sun
– Hackers use either solaric x86 or sco as a platform
– This is because these products are licensed ware & they can easily be obtained
Unix
– Popular platform because they required a low overhead
– We can run linux on a paltray 386 and gain good performance
– This is reasonable
Microsoft
Trang 5– This supports many security tools that can be used to attack remote machine.
– It has advanced tools for networking as well