9. Cyber Security & Computer Safety

🔹 9. Cyber Security & Computer Safety

(KPSC Group-C Non-Technical / FDA / SDA – Very Important Topic)

9.1 Introduction to Cyber Security

In the digital age, computers and the internet are used everywhere—government offices, banks, schools, hospitals, and personal life. Along with benefits, this has also increased cyber threats.

Definition:

Cyber Security is the practice of protecting computers, networks, data, and systems from unauthorized access, attacks, damage, or theft.

📌 For KPSC exams, questions from cyber security are:

Awareness-based

Practical

Direct MCQs

9.2 Why Cyber Security is Important

Cyber security is important because:

Protects personal data (Aadhaar, PAN, bank details)

Prevents financial fraud

Ensures data privacy

Safeguards government information

Maintains trust in digital services

📌 Government exams often link cyber security with Digital India & e-Governance.

9.3 What is a Cyber Crime?

Definition:

Cyber crime is any illegal activity that involves the use of computers, networks, or the internet.

9.3.1 Examples of Cyber Crimes

Hacking

Online fraud

Identity theft

Phishing

Spreading viruses

Cyber bullying

📌 MCQ Tip: Cyber crime = crime using computer or internet.

9.4 Types of Cyber Threats (VERY IMPORTANT)

9.4.1 Computer Virus

A malicious program

Attaches itself to files

Spreads from one system to another

Damages data and programs

📌 Virus needs human action to spread.

9.4.2 Worm

Self-replicating malware

Does not need a host file

Spreads automatically through networks.

9.4.3 Trojan Horse

Appears as useful software

Contains hidden malicious code

Steals data secretly

📌 Common MCQ: Trojan looks genuine but is harmful.

9.4.4 Spyware

Spies on user activity

Collects personal information

Runs in background

9.4.5 Adware

Displays unwanted advertisements

Slows down system

9.4.6 Ransomware (IMPORTANT)

Locks files or system

Demands money to unlock

Very dangerous

📌 Many recent cyber attacks are ransomware-based.

9.5 Hacking

Definition:

Hacking is the act of gaining unauthorized access to a computer system or network.

9.5.1 Types of Hackers

White Hat Hacker

Ethical hacker

Works legally

Improves security

Black Hat Hacker

Illegal hacker

Causes damage

Steals data

Grey Hat Hacker

Between white and black hat

May violate rules without harmful intention

📌 Frequently asked classification question.

9.6 Password Security

Importance of Strong Passwords

Weak passwords lead to:

Account hacking

Data theft

Financial loss

9.6.1 Characteristics of Strong Password

Minimum 8 characters

Mix of letters, numbers, symbols

Not personal information

Unique for each account

Example: Kp$c@2025!

9.6.2 One Time Password (OTP)

Used for verification

Valid for short time

Enhances security

📌 Never share OTP with anyone.

9.7 Authentication Methods

9.7.1 Single-Factor Authentication

Password only

9.7.2 Two-Factor Authentication (2FA)

Password + OTP

More secure

9.7.3 Multi-Factor Authentication (MFA)

Password + OTP + biometrics

Highest security

📌 Frequently used in banking and government portals.

9.8 Computer Security Tools

9.8.1 Antivirus Software

Definition:

Antivirus is a program that detects, prevents, and removes malware.

Functions:

Virus scanning

Real-time protection

Automatic updates

Examples:

Windows Defender

Quick Heal

Norton

📌 Antivirus must be updated regularly.

9.8.2 Firewall

Definition:

Firewall is a security system that monitors and controls incoming and outgoing network traffic.

Acts as a barrier

Prevents unauthorized access

📌 Can be hardware or software.

9.9 Secure Browsing Practices

Use HTTPS websites

Avoid clicking unknown links

Do not download from untrusted sources

Log out from public computers

9.10 Email Security

Common Email Threats

9.10.1 Phishing

Fake emails

Pretend to be trusted source

Steal passwords or bank details

📌 Phishing emails create urgency (e.g., “Account will be blocked”).

9.10.2 Spam

Unwanted emails

Mostly advertisements

Safety Tips:

Do not open unknown attachments

Verify sender email

Report phishing

9.11 Social Media Security

Risks:

Fake profiles

Data misuse

Identity theft

Safety Measures:

Strong privacy settings

Do not overshare personal details

Accept known contacts only

9.12 Cyber Safety for Online Banking

Never share ATM PIN

Use official apps only

Check website URL

Enable SMS/email alerts

📌 Bank never asks for OTP or PIN.

9.13 Data Backup & Recovery

What is Data Backup?

Copy of important data stored separately for safety.

Types of Backup

External hard drive

Pen drive

Cloud storage

📌 Backup protects against data loss due to virus or hardware failure.

9.14 Cloud Security (Basic Awareness)

Cloud services:

Google Drive

OneDrive

Dropbox

Security tips:

Enable 2FA

Strong passwords

Avoid public Wi-Fi for uploads

9.15 Cyber Laws in India (Basic)

Information Technology Act, 2000

Deals with cyber crimes

Legal framework for electronic transactions

📌 Questions may ask: IT Act year.

9.16 Cyber Security in Government Services

DigiLocker

Aadhaar authentication

Online portals

Secure databases

Cyber security ensures:

Transparency

Trust

Data protection

9.17 Common MCQ Traps (VERY IMPORTANT)

Question

Correct Answer

Virus spreads

Through infected files

Trojan

Disguised as useful software

Secure website

HTTPS

OTP validity

Short time

Antivirus role

Detects malware

1. Virus (The Parasite)

A computer virus acts like a biological virus. It cannot exist on its own; it must "hitch a ride" on a legitimate file (like a .exe or .docx file).

How it works: It stays dormant until you execute the infected file. Once opened, it can delete data, corrupt your OS, or encrypt files.

Example: A file named Free_Game.exe that infects your system only when you double-click it.

2. Worm (The Independent Invader)

A worm is more sophisticated because it is a standalone piece of software. It uses networks (like your office Wi-Fi or the internet) to find security holes in other computers and copy itself onto them.

How it works: It "crawls" through network connections. It consumes bandwidth and can install "backdoors" for hackers to access your system later.

Example: The ILOVEYOU worm, which famously self-sent to everyone in a user's contact list.

Protection Tips

To stay safe, the Cybersecurity & Infrastructure Security Agency (CISA) recommends:

Installing Antivirus: Use reputable software like Bitdefender or Malwarebytes.

Updating Software: Worms thrive on old security bugs; keeping your OS updated closes those "holes."

Firewalls: A strong firewall can block worms from entering your network in the first place.

9.18 Previous Year Question Trends

Identify malware types

Match cyber threats

Security best practices

Full forms (OTP, MFA, SSL)

9.19 How to Prepare This Topic for KPSC

✔ Focus on definitions

✔ Learn differences (virus vs worm)

✔ Remember real-life examples

✔ Practice MCQs

✔ Revise safety rules

✅ Conclusion

Cyber Security & Computer Safety is a high-relevance topic for KPSC Group-C exams because government work heavily depends on secure digital systems. Questions are practical, direct, and easy to score with proper preparation.