Cyber Safety (CBSE Class 11 Computer Science)

The Internet has become an essential part of our daily lives. We use it for education, communication, banking, shopping, entertainment, and social networking. While the Internet offers numerous benefits, it also exposes users to cyber threats such as hacking, phishing, malware, identity theft, and online fraud. Cyber Safety refers to the practices that help users stay secure while using digital devices and the Internet.

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Learning Objectives

• Understand Cyber Safety.
• Learn safe web browsing practices.
• Understand identity protection.
• Learn the importance of confidentiality.
• Develop responsible online behaviour.
• Protect personal information from cyber threats.

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What is Cyber Safety?

Cyber Safety involves following good security practices to reduce the risk of cyber attacks and protect personal as well as organizational information.

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Objectives of Cyber Safety

• Protect personal information.
• Prevent cyber crimes.
• Ensure safe online communication.
• Maintain privacy.
• Protect digital identity.
• Promote responsible digital citizenship.

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Importance of Cyber Safety

• Protects confidential information.
• Prevents financial fraud.
• Reduces identity theft.
• Protects online reputation.
• Improves digital confidence.
• Supports safe online learning.

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Safe Browsing

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Guidelines for Safe Browsing

• Visit trusted websites only.
• Check the website URL carefully.
• Prefer websites that use HTTPS.
• Never click unknown or suspicious links.
• Avoid downloading files from untrusted websites.
• Keep your browser updated.
• Use antivirus software.
• Log out after completing online transactions.

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Safe Browsing Checklist

Practice	Safe?
Checking HTTPS before login	✔ Yes
Clicking unknown email links	✘ No
Downloading software from official websites	✔ Yes
Ignoring browser security warnings	✘ No
Keeping the browser updated	✔ Yes

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Identity Protection

Personal information includes your name, address, phone number, Aadhaar number, passwords, bank account details, photographs, and login credentials.

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How to Protect Your Identity

• Never share passwords or OTPs.
• Use strong and unique passwords.
• Enable Two-Factor Authentication (2FA).
• Limit personal information shared online.
• Review privacy settings regularly.
• Avoid using the same password for multiple accounts.
• Monitor your online accounts for unusual activity.

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Password Strength Guide

Weak Password	Strong Password
123456	Ab#29!Tree$91
password	M@th2026#Learn
sunil123	C0de!Step@2026

Characteristics of a Strong Password

• At least 12 characters long.
• Uppercase and lowercase letters.
• Numbers.
• Special characters.
• No personal information.

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Two-Factor Authentication (2FA)

Two-Factor Authentication (2FA) adds an extra layer of security by requiring two different forms of verification before granting access to an account.

Example:

• Password
• OTP sent to mobile phone

Even if a password is stolen, the account remains more secure because the second verification step is required.

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Confidentiality

Confidential information should not be disclosed to unauthorized persons.

Examples of Confidential Information

• Passwords
• Bank account details
• Medical records
• School examination papers
• Employee records
• Personal identification numbers

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How to Maintain Confidentiality

• Share information only with authorized persons.
• Lock devices when not in use.
• Use strong passwords.
• Encrypt sensitive data where appropriate.
• Avoid discussing confidential information in public places.
• Dispose of sensitive documents securely.

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Safe vs Unsafe Practices

Safe Practices	Unsafe Practices
Using HTTPS websites	Ignoring browser warnings
Using strong passwords	Sharing passwords
Installing software from official sources	Downloading pirated software
Updating software regularly	Ignoring updates
Enabling 2FA	Using one password everywhere

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Cyber Alert

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Current Affairs & CBSE Connect

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Did You Know?

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Social Media Privacy Checklist

Social media platforms allow users to connect with friends, family, and communities. However, oversharing personal information can increase the risk of identity theft, cyberbullying, and online fraud.

Checklist	Status
Use a strong password	✔
Enable Two-Factor Authentication (2FA)	✔
Keep your profile private	✔
Accept friend requests only from known people	✔
Avoid sharing your live location publicly	✔
Review privacy settings regularly	✔
Think before posting photographs or personal information	✔

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Public Wi-Fi Safety

Public Wi-Fi networks available at airports, railway stations, shopping malls, hotels, cafés, and other public places may not always be secure. Attackers can attempt to intercept information transmitted over unsecured networks.

Safety Tips

• Avoid online banking or digital payments on public Wi-Fi.
• Use trusted websites with HTTPS.
• Log out after using online accounts.
• Turn off automatic Wi-Fi connection.
• Disable file sharing on public networks.
• Use a Virtual Private Network (VPN) if required.

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QR Code Scam Awareness

QR codes are widely used for digital payments, ticket booking, restaurant menus, and website links. Cyber criminals may create fake QR codes to redirect users to fraudulent websites or payment requests.

Precautions

• Scan QR codes only from trusted sources.
• Verify the website address before entering personal information.
• Read payment details carefully before confirming transactions.
• Never scan unknown QR codes received through suspicious messages.

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Digital Hygiene Checklist

Digital hygiene means maintaining good cyber safety habits while using computers and the Internet.

Digital Hygiene Practice	Done
Update operating system regularly	✔
Update antivirus software	✔
Backup important files	✔
Delete unused applications	✔
Review privacy settings	✔
Change passwords periodically	✔
Use licensed software	✔

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Cyber Safety Pledge

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Teacher Discussion Activity

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Real-Life Example

A student receives a message claiming that they have won a free smartphone and are asked to click a link and provide personal details. The student checks the sender, ignores the message, and reports it as spam.

This demonstrates responsible cyber safety practices.

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Case Study

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Do's and Don'ts

Do's	Don'ts
Use strong passwords.	Share passwords or OTPs.
Verify website addresses.	Click unknown links.
Enable Two-Factor Authentication.	Reuse the same password everywhere.
Install software from trusted sources.	Download pirated software.
Backup important files.	Ignore software updates.
Report suspicious activities.	Trust unknown emails or messages.

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Common Myths vs Facts

Myth	Fact
Antivirus alone provides complete protection.	Cyber safety also depends on responsible user behaviour.
Strong passwords never need to be changed.	Passwords should be changed periodically and after any suspected compromise.
Public Wi-Fi is always safe.	Public Wi-Fi can expose users to security risks if not used carefully.
Only adults become victims of cyber crime.	Students and children can also be targeted.
HTTPS guarantees a website is completely trustworthy.	HTTPS encrypts communication, but users should still verify the website and its legitimacy.

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Quick Revision Box

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Memory Trick

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Exam Tips

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CBSE Competency-Based Questions

Question 1

A student receives a message asking for an OTP to claim a scholarship amount.

1. Should the OTP be shared? Why?
2. Which cyber safety principle applies?
3. Suggest three precautions.

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Question 2

A user logs into an online banking account using a public Wi-Fi network at a café.

1. What risks are involved?
2. Suggest safer alternatives.

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Assertion–Reason Questions

1.

Assertion (A): Two-Factor Authentication improves account security.

Reason (R): It requires an additional verification step beyond the password.

Answer: Both A and R are true, and R is the correct explanation of A.

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2.

Assertion (A): Confidential information should be shared with everyone.

Reason (R): Confidential information is meant only for authorized persons.

Answer: Assertion is false, but Reason is true.

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Case-Based Question

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Multiple Choice Questions (MCQs)

1. Which protocol indicates that communication with a website is encrypted?

1. HTTP
2. HTTPS
3. FTP
4. SMTP

Answer: B

Explanation: HTTPS encrypts communication between the user's browser and the website.

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2. Which of the following should never be shared?

1. Email address
2. OTP
3. School website address
4. Public notice

Answer: B

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3. Which feature provides an additional layer of account security?

1. Cookies
2. 2FA
3. Browser Cache
4. Bookmarks

Answer: B

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4. Which of the following is a safe browsing practice?

1. Click every unknown link
2. Ignore browser warnings
3. Verify website URLs before entering information
4. Share passwords with friends

Answer: C

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5. Confidential information should be accessible only to:

1. Everyone
2. Authorized persons
3. Social media users
4. Unknown callers

Answer: B

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Short Answer Questions

1. Define Cyber Safety.
2. What is Safe Browsing?
3. What is Identity Protection?
4. Define Confidentiality.
5. What is Two-Factor Authentication?
6. State any four safe browsing practices.
7. Why is a strong password important?
8. List four precautions while using public Wi-Fi.

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Long Answer Questions

1. Explain Cyber Safety and its importance.
2. Discuss methods of protecting digital identity.
3. Explain the role of confidentiality in cyber security.
4. Describe safe browsing practices with suitable examples.
5. Discuss cyber safety measures that students should follow while using the Internet.

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Frequently Asked Questions (FAQs)

1. What is Cyber Safety?

Cyber Safety is the practice of using digital technologies securely and responsibly to protect users, devices, and information.

2. Why is HTTPS important?

HTTPS encrypts communication between the browser and the website, making data transmission more secure.

3. What is Two-Factor Authentication?

It is an authentication method that requires two forms of verification, such as a password and an OTP.

4. Why should passwords be strong?

Strong passwords are more difficult for attackers to guess or crack.

5. Why should confidential information be protected?

To prevent unauthorized access, identity theft, financial fraud, and misuse of personal information.

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Summary

• Cyber Safety promotes secure and responsible use of the Internet.
• Safe browsing helps users avoid malicious websites and online scams.
• Identity protection safeguards personal information from misuse.
• Confidentiality ensures that sensitive information is accessible only to authorized persons.
• Strong passwords, Two-Factor Authentication, software updates, and careful online behaviour greatly improve cyber security.

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