Cyber Security — Complete Study Notes

These exam-oriented notes cover all four modules of Cyber Security for MCA Semester I, based on the 219-page study material. The folder is arranged like a learning dashboard: a main module index, deep-dive articles, and quick revision resources.

Each module follows three learning layers:

1. Simple idea: plain language and a familiar analogy.
2. Worked example: a concrete, step-by-step scenario.
3. Technical meaning: correct definitions, tables, and exam points.

The notes use a recurring reference scenario — SecureBank, a small online-banking service — to keep examples consistent across modules.

Module-wise study method

1. Review prerequisites and identify the SecureBank asset being protected.
2. Complete one 10-15-minute study block at a time.
3. Map each threat to a security objective, preventive control, and limitation.
4. Attempt the mini quiz and practice ladder before revealing solutions.
5. Mark the module Mastered after explaining a fresh defensive scenario safely and accurately.

Module Index

Module	Topic	File
1	Fundamentals: cryptography, network & communication security, threats & vulnerabilities	Module 1
2	Security management, laws & standards, network security technologies	Module 2
3	Information & network security: access control & intrusion detection	Module 3
4	System & application security: architecture, OS, web, email, databases, forensics	Module 4

Deep-Dive Articles

Module	Article
1	Module-1-Article
2	Module-2-Article
3	Module-3-Article
4	Module-4-Article

Revision Tools

• Quick Revision - last-minute review of all modules.
• Cheat Sheet - algorithms, port numbers, protocol summaries.
• Important Questions - exam questions with answer points.
• MCQ - multiple-choice practice by chapter.
• Glossary - important terms in alphabetical order.
• Web Resources - official and high-quality external references.

How to use this folder

1. Read the matching module note first.
2. Open the matching article for a deeper explanation and extra examples.
3. Use the cheat sheet for fast revision.
4. Practice the MCQs and important questions without looking at the notes.

SecureBank reference scenario

Throughout the notes, SecureBank is used as a running example:

SecureBank = online banking app
Clients       : web/mobile apps over HTTPS
Backend       : application servers + database
Network       : Internet ← DMZ (reverse proxy + WAF) ← internal LAN
Assets       : customer credentials, session tokens, account records
Threat model  : outsider attacker (network) vs insider (staff)