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100 Days of 100 Days of Cybersecurity Fundamentals

Comprehensive beginner-friendly cybersecurity course covering core concepts from network basics to incident response. Progresses systematically through foundational knowledge to practical security implementations.

Level: beginnerCreated: 2/10/2026

This plan is public and visible in the Learning Plans Library.

Prerequisites

•Basic computer literacy
•Understanding of operating systems
•Familiarity with networking concepts

Learning Outcomes

✓Understand core cybersecurity principles and threat landscape
✓Implement basic network security measures
✓Apply cryptography and authentication methods
✓Detect and respond to security incidents
✓Build secure systems and conduct vulnerability assessments

Weekly Breakdown

Week Goals

• Define cybersecurity and threat landscape
• Understand CIA triad

Day 1

Introduction to Cybersecurity

Overview of cybersecurity, why it matters, and career paths.

Tasks

→Define cybersecurity
→Explore career opportunities
→Map personal learning goals

Day 2

CIA Triad Basics

Learn Confidentiality, Integrity, and Availability principles.

Tasks

→Study CIA triad components
→Identify CIA in real-world scenarios
→Document examples

Day 3

Threat Landscape Overview

Understand common threats, vulnerabilities, and attack vectors.

Tasks

→List top cyber threats
→Distinguish threats vs vulnerabilities
→Research recent breaches

Day 4

Attack Surfaces

Identify and analyze potential entry points for attackers.

Tasks

→Map attack surface components
→Analyze organizational vulnerabilities
→Create threat model

Day 5

Risk Management Framework

Learn risk assessment, analysis, and mitigation strategies.

Tasks

→Calculate risk scores
→Develop mitigation plans
→Build risk register

Day 6

Compliance & Standards Intro

Overview of NIST, ISO, GDPR, and regulatory requirements.

Tasks

→Review major compliance frameworks
→Compare regulatory standards
→Identify applicable regulations

Day 7

Security Policies Essentials

Understand purpose and structure of security policies.

Tasks

→Review policy templates
→Analyze policy components
→Draft sample policy