# Capture the Flag · Tech watch

[Canonical source](<https://sebastien.rigaux.be/en/tech-watch/tags/capture-the-flag>)

A cybersecurity competition or training format in which participants solve challenges to find validation strings known as flags.

Related tags : [Security](<https://sebastien.rigaux.be/en/tech-watch/tags/security>)

## [Hacker101: learn web security through CTF challenges](<https://sebastien.rigaux.be/en/tech-watch/links/hacker101-learn-web-security-through-ctf-challenges>)

Hacker101 offers free **web security** classes for programmers interested in bug bounties and seasoned security professionals. The site brings together video lessons, guides, and other resources.

Its **Capture the Flag (CTF)** levels are inspired by real-world scenarios and let learners put their skills into practice.

2026-11-08 · [Markdown](<https://sebastien.rigaux.be/en/tech-watch/links/hacker101-learn-web-security-through-ctf-challenges.md>) · [Original resource](<https://www.hacker101.com/>)

## [Hack The Box: assess cyber readiness through hands-on exercises](<https://sebastien.rigaux.be/en/tech-watch/links/hack-the-box-assess-cyber-readiness-through-hands-on-exercises>)

Hack The Box brings together labs, attack simulations, and offensive and defensive exercises to develop cybersecurity skills and assess teams’ operational readiness. The platform serves individuals, businesses, and the public sector.

For Blue Teams, it offers SOC readiness plans, incident-response simulations, and prebuilt or custom defensive CTFs. The content is described as mapped to MITRE and NIST, with more than 180 CTF scenarios listed for team assessments.

2026-11-08 · [Markdown](<https://sebastien.rigaux.be/en/tech-watch/links/hack-the-box-assess-cyber-readiness-through-hands-on-exercises.md>) · [Original resource](<https://www.hackthebox.com/>)

## [Hackropole: replay France Cybersecurity Challenge tasks](<https://sebastien.rigaux.be/en/tech-watch/links/hackropole-replay-france-cybersecurity-challenge-tasks>)

Hackropole lets users replay France Cybersecurity Challenge tasks throughout the year to learn cybersecurity. The platform lists 627 challenges of increasing difficulty and 752 solutions for learning.

Challenges cover cryptography, forensics, hardware, binary exploitation, reverse engineering and web security. The project is developed by ANSSI and provides Discord channels for joining the community.

2026-11-08 · [Markdown](<https://sebastien.rigaux.be/en/tech-watch/links/hackropole-replay-france-cybersecurity-challenge-tasks.md>) · [Original resource](<https://hackropole.fr/fr/>)