Course content (15 lessons)

1. Course Introduction: Cyber Security — Course Introduction: Cyber Security Cyber Security is the discipline of protecting digital assets — computers, networks, programs, and data — from unauthorized access, damage,…
2. Unit I Overview: Cyberspace, Layers & Threat Landscape — Unit I Overview: Cyberspace, Layers & Threat Landscape Unit I introduces the foundational vocabulary and conceptual framework of cyber security. Before you can defend a system,…
3. Classification of Cybercrimes, Categories & Criminal Profiles — Classification of Cybercrimes, Categories & Criminal Profiles A cybercrime is any illegal act in which a computer or digital device is either the instrument of the crime, the…
4. Cyber Threats, Cyberwarfare, Cyberstalking & Botnets — Cyber Threats, Cyberwarfare, Cyberstalking & Botnets This lesson explores the four major threat categories in Unit I's advanced coverage: the broader taxonomy of cyber threats,…
5. Cybercrime and Cloud Computing: Cloud Attack Vectors — Cybercrime and Cloud Computing: Cloud Attack Vectors Cloud computing has fundamentally transformed how organizations store, process, and access data. The shift from on-premises…
6. Unit II Overview: Attack Tools & Methods Landscape — Unit II Overview: Attack Tools & Methods Landscape Unit II surveys the practical toolkit of cyber attackers — the specific techniques, tools, and methodologies used to compromise…
7. Phishing, Password Cracking & Keyloggers — Phishing, Password Cracking & Keyloggers This lesson covers three of the most frequently used attack techniques against end users and authentication systems. Together, they form a…
8. Viruses, Trojans, Backdoors, Steganography & DoS/DDoS — Viruses, Trojans, Backdoors, Steganography & DoS/DDoS This lesson covers the full malware taxonomy and denial-of-service attacks — the core offensive tools detailed in Unit II.…
9. Unit III Overview: Introduction to Cryptography — Unit III Overview: Introduction to Cryptography Cryptography is the science of securing information through mathematical transformations. It is the most fundamental technical tool…
10. Symmetric Cryptography: DES, AES & 3DES — Symmetric Cryptography: DES, AES & 3DES Symmetric-key cryptography is an encryption method where the same key is used for both encryption and decryption. The key must be shared…
11. Asymmetric Cryptography: RSA & Digital Signatures — Asymmetric Cryptography: RSA & Digital Signatures Asymmetric (public-key) cryptography uses mathematically linked key pairs: a public key (shared openly with anyone) and a private…
12. Web Security, Firewalls, Email Security & Identity Management — Web Security, Firewalls, Email Security & Identity Management This lesson covers the practical application of security controls to protect web communications, email, and user…
13. Unit IV Overview: Introduction to Cyber Forensics — Unit IV Overview: Introduction to Cyber Forensics Cyber Forensics (also called Digital Forensics or Computer Forensics ) is the application of scientific methods to identify,…
14. Digital Evidence Rules, RFC 2822 & Chain of Custody — Digital Evidence Rules, RFC 2822 & Chain of Custody The admissibility of digital evidence in court hinges on strict adherence to evidence handling protocols. A technically perfect…
15. Forensics Lifecycle, Investigation Phases & OSI Model in Forensics — Forensics Lifecycle, Investigation Phases & OSI Model in Forensics This final lesson covers the systematic process of conducting a digital forensics investigation — from the…

Course Introduction: Cyber Security

Course Introduction: Cyber Security

Cyber Security is the discipline of protecting digital assets — computers, networks, programs, and data — from unauthorized access, damage, theft, or attack. In today's hyper-connected world, cyber security is not optional; it is a fundamental requirement for every individual, organization, and government entity.

This BCA course covers the complete university syllabus across four units: foundational concepts and cybercrimes (Unit I), attack tools and methods (Unit II), cryptography and web security (Unit III), and cyber forensics (Unit IV). By the end, you will be able to identify cyber threats, apply cryptographic protections, secure web applications, and conduct basic digital forensics investigations.

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The CIA Triad — The Cornerstone of Cyber Security

Every security decision maps back to the CIA Triad: Confidentiality, Integrity, and Availability. These three properties define what it means for a system to be secure.

Extended beyond the triad, the PAIN model adds four more properties:

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Why Cyber Security Matters — Real-World Scale

Cybercrime costs the global economy over $8 trillion annually (Cybercrime Magazine, 2023). A cyber attack occurs every 39 seconds. Notable breaches illustrate the real stakes:

• Yahoo (2013–2014): 3 billion accounts compromised — the largest data breach in history
• Equifax (2017): 147 million citizens' personal data stolen; settled for $700M
• **SolarWinds (

Continue reading: Course Introduction: Cyber Security →

Frequently asked questions

Is the Cyber Security course really free?

Yes. The entire Cyber Security course on Siksha Sarovar is free to read with no account required. You can optionally sign in with Google to save your progress.

Do I get a certificate for Cyber Security?

Yes — finish the lessons and pass the quiz to earn a free, verifiable certificate you can share on LinkedIn or with recruiters.

Can I run code while learning?

Yes. The built-in online compiler runs C, C++, Python, Java, PHP, JavaScript, C# and SQL directly in your browser — no installation needed.