This document provides an introduction to network security and hacking. It discusses that network security involves policies, procedures, laws, human behavior, and technical aspects. It defines hacking as attempting to gain unauthorized access to computer resources, and distinguishes between hackers and crackers. Hackers use their skills constructively and never damage data, while crackers enter systems violently and cause damage. The document also discusses the operating systems commonly used by hackers, including Sun, Unix, and Microsoft.

1. Lecture 17
Introduction to Hacking

2. 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.
2

3. Hacking
 THE PROCESS OF ATTEMPTING TO GAIN OR
SUCCESSFULLY GAINING,UNOTHORIZED ACCESS TO
COMPUTER RESOURCES FOR THE PURPOSE OF HELP
OR SECURE SYSTEM IS CALLED HACKING

4. HISTORY OF HACKING
1966 – ROBERT MORRIS INTRODUCES THE
CONCEPT OF SAFE HACKING.
1969 – DEVELOPMENT IN THE FIELD OF
HACKING.
1990 – ELECTRONIC FRONTIER FOUNDATION
WAS FOUNDED.
1995 – MARK ANDREESSON & ERIC RELEASE
MOSAIC.

5. WHO IS HACKER?
 HACKER IS NOT CYBER CRIMINAL 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

6. 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

7. 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 COMPITITOR COMPANY, FOR CRACKING CREDIT
CARD NUMBER

8. DIFFERENCE BETWEEN HACKER &
CRACKER
 HACKER’S PROGRAMS TO
CHECK INTIGRITY OF OTHER
PROGRAMS.THUS WHEN
HACKERS CREATE PROGRAM
IT AUTOMATICALLY CHECKS
REMOTE MACHINE
SECURITY STRUCTURE
 THEY ALWAYS DO
CONTRUCTIVE WORK
 CRACKERS RARELY MAKE
THEIR OWN PROGRAM
.INSTEAD ,THEY STEAL
TOOL,PROGRAMS FROM
OTHERS
 CRACKERS CREATES
NOTHING & DESTROY
MUCH

9. WHICH OPERATING SYSTEM HACKER USE
SUN
UNIX
MICROSOFT

10. SUN
HACKERS Use EITHER SOLARIC X86 OR SCO AS
A PLATFORM.
THIS IS BECAUSE THESE PRODUCTS ARE
LICENSED WARE & THEY CAN EASILY BE
OBTAINED.

11. UNIX
POPULAR PLATFORM BECAUSE THEY
REQUIRED A LOW OVERHEAD.
WE CAN RUN LINUX ON A PALTRAY 386 AND
GAIN GOOD PERFORMANCE.
THIS IS REASONABLE.

12. MICROSOFT
THIS SUPPORTS MANY SECURITY TOOLS THAT
CAN BE USED TO ATTACK REMOTE MACHINE.
IT HAS ADVANCED TOOLS FOR NETWORKING
AS WELL.