Skill · Security · Understand threats and reason about defense
Choose and justify a security measure from the principles, and classify it by type
Choose a security measure and justify it with a principle (separation of privilege, secure by default, minimization, Zero Trust, traceability…), classifying it by category (technical, organizational, physical) and by type (deterrent, preventive, detective, corrective, compensating).
Start lesson 1The Security domain
- 10 lessons
- ~3 h 55 of reading
- 13 quizzes
- 0 proof lab
The path
Where it comes from, where it leads
What you need to know first, where you stand on this skill, and what it opens next. Your status is computed in your browser, from what you have read and passed.
Before · no prerequisite
A foundation skill: you can start right away.
This skill, for you
Choose and justify a security measure from the principles, and classify it by type
Computing
It unlocks · 1 skill
The path through the foundations From the most upstream foundation to this skill: what is in place, what remains to read.
Lessons
How to learn it
10 lessons, about ~3 h 55, in program order. Each lesson ends with its quiz.
The program
10 lessons · ~3 h 55
- 1Principes de sécurité : introduction (in French)· 5 min
- 2Triade CIA : les 3 piliers de la sécurité (in French)· 25 min
- 3Types de mesures : préventif, détectif, correctif (in French)· 25 min
- 4Minimisation : ne garder que le strict nécessaire (in French)· 25 min
- 5Séparation des privilèges (in French)· 25 min
- 6Sécurité par défaut (in French)· 25 min
- 7Zero Trust : ne jamais faire confiance, toujours vérifier (in French)· 25 min
- 8Non-répudiation et traçabilité (in French)· 25 min
- 9Les référentiels de la sécurité : NIST, ISO, CIS, ANSSI (in French)· 30 min
- 10Pas de sécurité par l'obscurité : Kerckhoffs (in French)· 25 min
Beyond the lessons
Assess, practise, pass the proof
Reading a lesson confirms nothing. A skill is confirmed by a passed quiz, practised in a guided lab, and put to the test by a challenge or a mission; an imported lab result is not verified by the site.
Assess yourself
13 quizzes
At the end of the lessons: passed at 70%, they confirm the skill.
Practice
No guided lab
No guided lab practices it yet.
Proof
No proof
Neither a challenge nor a mission with a proof yet.
Apply it on real infrastructure
- Threat, risk, vulnerability, attack: understanding the differences
- Attack surface: what your system exposes
- Least privilege: grant just what is needed
- Defence in depth: securing in layers
Hands-on lessons: their labs count as practice and their quizzes assess you, without being required to acquire it.
Placement test
Preparing the questions…
Your answers in detail
For each question asked: your answer, the correct answer, its explanation and the page to reread.
Around it
Who requires it, who teaches it
Required by
Taught by
Same block · Understand threats and reason about defense