Cyber Security — Complete BSCS Notes
Introduction to Cyber Security
Definition: Cyber Security protects systems, networks and data from attacks.
Cyber Threat Landscape: Includes hacking, phishing, malware.
Example: Protecting bank systems from hackers.
Information Security Principles (CIA)
Confidentiality: Only authorized access
Integrity: Data should not change illegally
Availability: Data accessible when needed
Attackers & APT
Types: Hackers, insiders, terrorists
APT: Long-term targeted attack
Example: Nation-state cyber attack
Malware & Attacks
Definition: Malicious software
Types: Virus, Worm, Trojan, Ransomware
Lifecycle: Attack stages from entry to damage
Basic Cryptography
Definition: Securing data using encryption
Types: Symmetric, Asymmetric, Hashing
Example: Password hashing
Web & Database Security
Web Attacks: SQL Injection, XSS
Database Security: Protect stored data
Network & Software Security
Network Security: Firewall, VPN
Software Security: Secure coding
Mobile Security
Device Security: Protect phones
App Security: Secure mobile apps
Digital Forensics
Definition: Investigating cyber crimes
Types: Computer, Network, Mobile forensics
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