Revise it. Then prove it.
Free cybersecurity revision,
with hands-on practice.
Learn the theory with notes, flashcards and quizzes, then put it to the test on hands-on challenges marked in your browser. Save your progress and earn a certificate for every module you pass. Checked against the current versions of OWASP, NIST and MITRE ATT&CK.
40 chapters · 188 flashcards · 100 quiz questions · 19 challenges · 84 glossary terms
Topics
Security Fundamentals
The CIA triad, security controls, threat actors and the core ideas every other topic builds on.
5 chapters
Cryptography
Symmetric and asymmetric encryption, hashing, digital signatures, TLS and PKI, and how they fail.
6 chapters
Networks & Network Security
TCP/IP, the protocols and ports you must know, network attacks, and the defences: firewalls, IDS, VPNs.
3 chapters
Web Security
How the web works and how it breaks: the OWASP Top 10, injection, XSS, broken auth and access control.
4 chapters
OS & Identity Security
Linux permissions and hardening, Windows and Active Directory, privilege escalation and authentication.
3 chapters
Threats & Malware
Malware families, ransomware, social engineering and phishing, and mapping attacks with MITRE ATT&CK.
3 chapters
Forensics & Incident Response
The incident response lifecycle, evidence handling, disk, memory and network forensics, log analysis.
3 chapters
Governance, Risk & Law
Risk management, NIST CSF 2.0, ISO 27001, UK GDPR and the Computer Misuse Act: the rules of the game.
3 chapters
CTF & Practical Skills
Hands-on tradecraft: methodology, nmap, Wireshark, Burp Suite, password cracking and CTF categories.
4 chapters
OSINT
Open-source intelligence from domain records, Shodan, breach databases, geolocation and dark-web sources, plus the tools and methodology to bring it together.
6 chapters
How you'll study
A structured course
Modules you can take in any order: lessons, checkpoint quizzes, then a practical exam. Pass the exam and you earn that module's certificate.
Hands-on challenges
Auto-graded puzzles built on real artifacts: forge a JWT, crack a cipher, read an auth log. Your answer is hashed and checked in the browser; hints and a walkthrough are there when you're stuck.
Quizzes
Multiple-choice questions per topic, each with an explanation, to test recall and surface the gaps before an exam.
Flashcards
Flashcard decks for drilling the terms and definitions until they stick.
Common questions
How can I revise cybersecurity for free?+
Cyber Revision is a free cybersecurity revision site. Work through the notes, flashcards and quizzes for each topic, then test yourself on hands-on challenges. There is no paywall and nothing to install.
Where can I practise cybersecurity skills online?+
Every challenge here is hands-on and marked in your browser with SHA-256. You can practise real skills like decoding tokens, cracking ciphers and reading logs, with no VM or VPN to set up.
Is there a free cybersecurity course with a certificate?+
Yes. The course runs module by module, and passing a module's exam earns a free certificate. Every module is unlocked from the start, so you can begin with whichever topic you need.
Is the cybersecurity content up to date?+
Yes. It is checked against current standards: OWASP Top 10:2025, NIST CSF 2.0 and MITRE ATT&CK v19.
Who is Cyber Revision for?+
Anyone revising cybersecurity: students, career changers, and people brushing up before an interview or a certification such as CompTIA Security+.