NULL//SEC — Cybersecurity Training System
NULL//SEC is a gamified cybersecurity training platform: 50 courses, 500+ levels, sandboxed log, packet, phishing and code-audit challenges, an AI training companion and PDF certificates. Free, offline-ready, runs in your browser.
JavaScript is required to run the training system. Your progress is stored locally in your browser (IndexedDB).
What you get
- 50 courses and 500+ levels with lessons, quizzes and final assessments
- Sandboxed, simulated challenges: log hunting, packet traces, sign-in anomalies, code audits, cipher labs, phishing analysis
- NULL, an AI training companion that explains, hints and quizzes
- XP, ranks, streaks, daily protocols and achievements
- PDF certificates of completion
Courses
- Cybersecurity Fundamentals
- Networking Fundamentals
- TCP/IP
- DNS
- HTTP & HTTPS
- Linux Fundamentals
- Linux Security
- Windows Security
- Operating System Security
- Cryptography Fundamentals
- Applied Cryptography
- Authentication
- Authorization & Access Control
- Password Security
- Identity & Access Management
- Web Security Fundamentals
- OWASP Web Security
- SQL Injection
- Cross-Site Scripting
- CSRF
- Session Security
- API Security
- Secure Coding
- JavaScript Security
- Cloud Security
- Container Security
- DevSecOps
- Network Security
- Firewalls
- VPN & Secure Communications
- Security Monitoring
- SIEM Fundamentals
- Log Analysis
- Incident Response
- Digital Forensics
- Malware Analysis Fundamentals
- Threat Intelligence
- Social Engineering Awareness
- Security Architecture
- Zero Trust
- Security Operations
- Penetration Testing Fundamentals
- Vulnerability Assessment
- Security Testing
- Mobile Security
- IoT Security
- Privacy & Data Protection
- Secure Software Development
- Capture The Flag Fundamentals
- Cybersecurity Career Lab
A Subversive Symmetry project.