Cybersecurity Full Revision Summary (Chapters
1–20)
Chapter 1: Introduction
Cybersecurity protects systems, networks, and data from attacks, damage, and unauthorized access. It
focuses on confidentiality, integrity, and availability (CIA triad).
Chapter 2: Cyber Threats
Threats include malware, phishing, hacking, insider threats, and social engineering. These exploit
vulnerabilities in systems and humans.
Chapter 3: Security Principles
Key principles include confidentiality, integrity, availability, authentication, authorization, and
accountability.
Chapter 4: Security Models
Models like Bell-LaPadula and Biba define how data is accessed and protected in secure systems.
Chapter 5: Cryptography Basics
Cryptography protects data using encryption, decryption, hashing, and digital signatures. Symmetric
uses one key; asymmetric uses public/private keys.
Chapter 6: Operating System Security
OS security includes user management, permissions, patching, hardening, and access control to
protect system resources.
Chapter 7: Advanced Cryptography
Includes AES, RSA, hashing algorithms, and secure communication protocols like SSL/TLS and
HTTPS.
1–20)
Chapter 1: Introduction
Cybersecurity protects systems, networks, and data from attacks, damage, and unauthorized access. It
focuses on confidentiality, integrity, and availability (CIA triad).
Chapter 2: Cyber Threats
Threats include malware, phishing, hacking, insider threats, and social engineering. These exploit
vulnerabilities in systems and humans.
Chapter 3: Security Principles
Key principles include confidentiality, integrity, availability, authentication, authorization, and
accountability.
Chapter 4: Security Models
Models like Bell-LaPadula and Biba define how data is accessed and protected in secure systems.
Chapter 5: Cryptography Basics
Cryptography protects data using encryption, decryption, hashing, and digital signatures. Symmetric
uses one key; asymmetric uses public/private keys.
Chapter 6: Operating System Security
OS security includes user management, permissions, patching, hardening, and access control to
protect system resources.
Chapter 7: Advanced Cryptography
Includes AES, RSA, hashing algorithms, and secure communication protocols like SSL/TLS and
HTTPS.
