Cyber Safety and Security Threats, CBSE Class 9 ICT

Complete notes on cyber safety for CBSE Class 9 ICT. Covers viruses, malware, phishing, cyberbullying, safe browsing, and online safety tips.

Cyber safety is one of the most important and frequently tested topics in CBSE Class 9 ICT. In today's digital age, understanding online threats and how to protect yourself is essential. This guide covers all security threats, types of malware, and safety measures you need to know.

What is Cyber Safety?

Cyber Safety refers to the safe and responsible use of the Internet and technology. It involves protecting yourself from online threats like hacking, viruses, identity theft, and cyberbullying.

Types of Cyber Threats

1. Malware (Malicious Software)

Malware is any software designed to harm or exploit computers and networks. There are several types:

Type	Description	How It Spreads
Virus	Attaches itself to a file and spreads when the file is executed	Email attachments, USB drives, downloads
Worm	Replicates itself and spreads across networks without user action	Network connections, emails
Trojan Horse	Disguises itself as legitimate software	Free software downloads, email links
Spyware	Secretly monitors user activity and collects data	Software bundles, malicious websites
Adware	Displays unwanted advertisements	Free software bundles
Ransomware	Encrypts files and demands money to unlock them	Email attachments, malicious links
Keylogger	Records every keystroke to steal passwords	Trojan installations, phishing

Exam tip: Know the difference between virus, worm, and Trojan. A virus needs a host file, a worm spreads on its own, and a Trojan pretends to be useful software.

2. Phishing

Phishing is a type of cyber attack where criminals send fake emails or create fake websites that look like legitimate ones to steal personal information like passwords, credit card numbers, and bank details.

Example of phishing:

You receive an email that looks like it is from your bank, The email says "Your account will be blocked. Click here to verify", The link takes you to a fake website that looks exactly like your bank's site, When you enter your password, the criminals steal it

How to Identify Phishing:

Check the sender's email address carefully
Look for spelling and grammar mistakes
Do not click on suspicious links
Legitimate organizations never ask for passwords via email
Check the URL, look for https:// and the correct domain name

3. Hacking

Hacking is the unauthorized access to a computer system or network. A person who hacks is called a hacker.

Type of Hacker	Also Known As	Intent
White Hat	Ethical Hacker	Tests security with permission
Black Hat	Cracker	Malicious intent, illegal
Grey Hat	-	Hacks without permission but without malicious intent

4. Identity Theft

Identity theft occurs when someone steals your personal information and uses it to pretend to be you. They may use your name, Aadhaar number, or bank details for fraud.

5. Cyberbullying

Cyberbullying is the use of technology to harass, threaten, embarrass, or target another person. It includes:

Sending threatening messages, Spreading rumors online, Posting embarrassing photos without permission, Creating fake profiles to mock someone, Excluding someone from online groups deliberately

How to Deal with Cyberbullying:

Do not respond to the bully
Save evidence - take screenshots
Block the person on all platforms
Report the behavior to the platform
Tell a trusted adult - parent, teacher, or counselor
If serious, report to cyber crime authorities

6. Cyber Stalking

Cyber Stalking is the repeated use of the Internet or electronic communication to harass or frighten someone. It includes following someone's online activity, sending threatening emails, and monitoring their location.

7. Spam

Spam refers to unwanted, unsolicited messages sent in bulk, usually by email. Spam can:

Clog your inbox, Contain phishing links, Carry malware in attachments, Waste your time and bandwidth

Online Safety Measures

Password Safety

A strong password is your first line of defense.

Rules for creating a strong password:

Use at least 8-12 characters
Include a mix of uppercase and lowercase letters
Include numbers (0-9)
Include special characters (!@#$%^&*)
Do not use personal information (name, birthday)
Do not use dictionary words
Use different passwords for different accounts
Change passwords regularly

Example of a weak password: password123, rahul2010

Example of a strong password: R@hul#2k10!Mx

Safe Browsing Practices

Use HTTPS websites (look for the padlock icon)
Do not click on suspicious links or pop-ups
Do not download software from untrusted sources
Keep your browser updated
Clear browsing history and cookies regularly
Use private/incognito mode on shared computers
Log out of accounts after use, especially on shared computers

Social Media Safety

Set profiles to private
Do not share personal information (phone number, address, school name)
Do not accept friend requests from strangers
Think before you post - once online, always online
Review privacy settings regularly
Do not share your location publicly
Report suspicious accounts or behavior

Email Safety

Do not open attachments from unknown senders
Do not click links in suspicious emails
Verify the sender's email address
Use spam filters
Do not share sensitive information via email

Antivirus Software

Antivirus software is a program designed to detect, prevent, and remove malware from your computer.

How Antivirus Works:

Scanning - Checks files and programs for known malware patterns
Real-time protection - Monitors activity in real-time
Quarantine - Isolates suspicious files
Updates - Downloads new virus definitions regularly

Popular Antivirus Software:

Quick Heal, Norton, Kaspersky, Avast, Windows Defender (built into Windows)

Firewall

A firewall is a network security system that monitors and controls incoming and outgoing network traffic. It acts as a barrier between a trusted network and an untrusted network (like the Internet).

Types of firewall:

Hardware firewall - A physical device between your network and the Internet
Software firewall - A program installed on your computer (e.g., Windows Firewall)

Cookies

Cookies are small text files that websites store on your computer to remember your preferences and login information.

Type	Purpose	Duration
Session cookies	Temporary, deleted when browser closes	One session
Persistent cookies	Stored for a set period	Days to years
Third-party cookies	Placed by advertising networks	Varies

Are cookies dangerous? Cookies themselves are not harmful, but they can be used to track your browsing habits. You should clear cookies regularly for privacy.

Indian Cyber Laws

The Information Technology Act, 2000 (IT Act) is the primary law in India dealing with cybercrime and electronic commerce. Important provisions:

Section	Offense	Punishment
Section 43	Unauthorized access to computer systems	Compensation up to Rs. 1 crore
Section 66	Computer-related offenses (hacking)	Up to 3 years imprisonment and/or fine
Section 66C	Identity theft	Up to 3 years imprisonment and fine up to Rs. 1 lakh
Section 67	Publishing obscene material online	Up to 5 years imprisonment and fine up to Rs. 10 lakh

Cyber Crime Helpline in India: 1930 (National Cyber Crime Reporting Portal: cybercrime.gov.in)

Important Questions

Q1. What is the difference between a virus and a worm?

A virus attaches itself to a file and requires the user to execute the file to spread. A worm is a standalone program that replicates itself and spreads across networks automatically without requiring user action.

Q2. What is phishing? How can you protect yourself?

Phishing is a cyber attack where criminals create fake emails or websites that look legitimate to steal personal information like passwords and bank details. To protect yourself, verify the sender's email address, do not click suspicious links, check for HTTPS in the URL, and never share passwords via email.

Q3. List five rules for creating a strong password.

A strong password should have at least 8 characters, include uppercase and lowercase letters, include numbers, include special characters, and should not contain personal information like your name or birthday.

Q4. What is cyberbullying? How should you respond to it?

Cyberbullying is the use of technology to harass, threaten, or embarrass someone. If you face cyberbullying, do not respond to the bully, save the evidence by taking screenshots, block the person, report the behavior to the platform, and inform a trusted adult.

Q5. What is a firewall?

A firewall is a security system that monitors and controls incoming and outgoing network traffic. It acts as a barrier between your trusted internal network and untrusted external networks like the Internet. It can be hardware-based or software-based.

Quick Revision

Malware = malicious software (virus, worm, Trojan, spyware, ransomware)
Virus needs a host file; worm spreads on its own; Trojan disguises as useful software
Phishing = fake emails/websites to steal information, Strong password = 8+ characters, mixed case, numbers, special characters
Firewall = barrier between trusted and untrusted networks
Cookies = small files stored by websites on your computer
IT Act, 2000 = India's primary cyber law, Cyber crime helpline: 1930