Learn Cyber Security Free — Tutorials & Practice for Students

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TL;DR: Free Cyber Security tutorials, examples and coding practice for Indian students. Beginner to advanced, with an in-browser editor and AI feedback — no…

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Free Cyber Security course: 30 lessons, from the basics through to the advanced topics interviewers actually ask about. Every lesson is free, needs no sign-up, and runs in your browser with an editor and instant AI feedback.

Cyber Security Course Syllabus — 30 Lessons

Work through them in order, or jump to the topic you need. 30 lessons include worked explanations and runnable examples.

Cybersecurity Basics

• What is Cybersecurity — Cybersecurity is the practice of protecting digital systems, networks, and information from unauthorized access, theft, damage, and cyber attacks.
• Creating Strong Passwords — A strong password is the first line of defense against unauthorized account access.
• Two-Factor Authentication — Two-Factor Authentication (2FA) requires two different forms of proof to verify your identity: something you know (password) and something you have (phone) or something you are (fingerprint).

Threats & Attacks

• Phishing Attacks — Phishing is a social engineering attack where attackers impersonate legitimate organizations via email, SMS, or websites to trick users into revealing sensitive information like passwords or financial data.
• Malware (Virus/Worm/Trojan) — Malware (malicious software) includes viruses, worms, trojans, spyware, and ransomware designed to harm systems, steal data, or compromise functionality.
• Ransomware — Ransomware is a type of malware that encrypts a victim's files or locks their system, demanding payment (ransom) for decryption.
• DDoS Attacks — A Distributed Denial of Service (DDoS) attack floods a target server with traffic from multiple sources, overwhelming its capacity and making it unavailable to legitimate users.
• Social Engineering — Social engineering exploits human psychology rather than technical vulnerabilities to gain unauthorized access or sensitive information.
• SQL Injection — SQL Injection is a code injection attack where attackers insert malicious SQL commands into input fields to manipulate databases.
• Cross-Site Scripting (XSS) — Cross-Site Scripting (XSS) is a vulnerability where attackers inject malicious JavaScript code into web pages viewed by other users, allowing them to steal cookies, session tokens, or perform actions on behalf of users.
• Data Breaches — A data breach is unauthorized access to sensitive information—customer data, passwords, financial records, or intellectual property.

Protection Tools

• Antivirus & Anti-malware — Antivirus and anti-malware software scan files and system memory for malicious code signatures and suspicious behavior, protecting devices from infections.
• Firewalls — A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules, acting as a barrier between trusted and untrusted networks.
• Backup Strategies (3-2-1 Rule) — The 3-2-1 backup rule means maintaining 3 copies of important data: 2 on different media types (e.g., hard drive and SSD), and 1 in a geographically separate location (e.g., cloud or offsite).
• Password Managers — A password manager is a secure vault that stores all your passwords using strong encryption.
• Secure Wi-Fi Setup — A secure Wi-Fi network uses strong encryption (WPA3 or WPA2), complex passwords, and proper access controls to prevent unauthorized network access and data interception.
• Software Updates & Patching — Software updates and patches fix security vulnerabilities, performance issues, and bugs.

Privacy & Encryption

• VPN — A Virtual Private Network (VPN) creates an encrypted tunnel between your device and a VPN server, hiding your IP address and encrypting all traffic from snoopers.
• Encryption Basics (Symmetric vs Asymmetric) — Encryption converts readable data (plaintext) into unreadable code (ciphertext) using a mathematical algorithm and key, ensuring only authorized parties with the correct key can read it.
• HTTPS & SSL/TLS — HTTPS (HTTP Secure) encrypts data in transit between your browser and a website using SSL/TLS protocols.
• GDPR & India\ — The General Data Protection Regulation (GDPR) is EU law requiring organizations to protect personal data, obtain consent before processing, and provide users rights to access/delete their data.

Online Safety

• Public Wi-Fi Risks — Public Wi-Fi at coffee shops, airports, and hotels is convenient but inherently insecure.
• Digital Footprint — Your digital footprint is all the information about you available online: social media posts, photos, comments, websites you've visited, and data collected by companies.
• Cyberbullying Awareness — Cyberbullying is harassment, humiliation, or threats conducted online through social media, messaging apps, email, or other digital channels.
• Identity Theft — Identity theft occurs when someone steals your personal information (name, SSN, passport number, financial data) and uses it fraudulently to open accounts, make purchases, or commit crimes in your name.

Advanced Topics

• IoT Security — Internet of Things (IoT) devices—smart home devices, security cameras, thermostats, medical equipment—connect to networks but often have weak security, making them targets for compromise.
• Cloud Security Basics — Cloud security involves protecting data and applications hosted on cloud platforms (AWS, Azure, Google Cloud).
• Ethical Hacking — Ethical hacking (authorized penetration testing) involves authorized security professionals testing systems for vulnerabilities, helping organizations identify and fix security flaws before attackers do.
• Zero-Day Vulnerabilities — A zero-day vulnerability is a previously unknown security flaw that vendors haven't patched yet.
• Cybersecurity Careers — Cybersecurity careers range from entry-level Security Analyst positions to expert roles like Chief Information Security Officer (CISO).

Who this Cyber Security course is for

School and college students in India starting from zero, and anyone revising Cyber Security for placements, board practicals or a project. There is no prerequisite beyond being able to type — the first lessons assume no programming background at all.

How to study this course

1. Read the lesson, then run the example in the built-in editor before moving on — reading code is not the same as writing it.
2. Try the practice task at the end of each lesson. Getting it wrong and fixing it is where the learning happens.
3. When you are stuck, ask the free AI Tutor to explain that specific line rather than skipping ahead.

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