This document provides an overview of cyber security fundamentals, including definitions, types of attacks, and examples. It defines cyber security as protecting computers, networks, programs and data from unintended access. It outlines two main types of cyber attacks: web-based attacks, which target websites and applications, and system-based attacks, which compromise individual computers or networks. Specific web-based attacks discussed include DDoS, SQL injection, brute force, man-in-the-middle, sniffing, phishing, spoofing, and social engineering. System-based attacks covered are viruses, worms, Trojan horses, backdoors, and botnets.

1. S.M.Towhidul Islam
181-35-2435
Cyber Security Fundamentals(Imtiaz Murshed Sir)

2. Following Information WE Should
Know
1. What is Cyber security?
2. Types of Cyber Attacks..
3. Web Based Attacks ….
4. System Based Attacks….

3. Cyber Security
•Cyber security is a practice which intends to protect
computers, networks, programs and data from
unintended or unauthorized access, change or
destruction …

4. What is cyberAttack ?
•An attempt by hackers to damage or
destroy a computer network or system.

5. Types of Attack !
• Web Based Attack:
These are attack on a website or web
application…
• System Based Attack:
Attacks that are intended to compromise a
computer or a computer network…

6. Web BasedAttack
• DoS
• dDoS
• Brute Force
• Session Hijacking
• Man in Middle
• sQl Injection
• Phishing
• Sniffing
• Spoofing
• Social engineering
• Whaling

7. System BasedAttacks
• Virus
•worms
•Trojan Horse
•Back Doors
•Bots

8. Web Based Attack
Dos Attack: A DOS attack is an attempt to make a system or server unavailable for legitimate users and
finally, to take the service down.
SQL Injection: SQL injection is a code injection technique, used to attack data-driven applications, in which
anonymously statements are inserted into an entry field for execution.
Brute Force: A Brute Force Attack is the simplest method to gain access to a site or server. It tries various
combinations of usernames and passwords again and again until it gets in.
MIMA: MIMA-Attacker intercept the connection between client and server and acts as a bridge between
them.
Snipping Attack: Sniffer Attack- A sniffer is an application or device that can read, monitor, and capture
network data exchanges and read network packets.
Phishing Attack: Phishing- is the attempt to obtain sensitive information by disguising as a trustworthy
entity in an electronic communication.
Social engineering: Social engineering is a form of techniques employed by cybercriminals designed
to lure unsuspecting users into sending them their confidential data, infecting their computers with
malware or opening links to infected sites.
WHALING: A whaling attack is a kind of phishing scam and CEO fraud that targets high profile executives with
access to highly valuable information.

9. System Based Attack
VIRUS: A computer virus, much like a flu virus, is designed to spread from host to host and has the ability to
replicate itself.
WORMS: A computer worm is a standalone Malware computer program that replicates itself in order to spread
other computers
TROJAN HORSE: Trojan horse is a program that claims to rid your computer of viruses but instead introduces
viruses onto your computer.
BACKDOOR: A backdoor is a technique in which a system security mechanism is bypassed undetectably to access a
computer or its data.
BOTNET: A botnet is a group of computers connected in a coordinated fashion for malicious purposes.

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