Sébastien Rigaux

Tech watch

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Capture the Flag

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

Two people wearing black caps marked with the number 11 lean over a keyboard.

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.

HackerOne

Hack The Box banner on a dark navy background, with the green-and-white logo, the text “Cyber Mastery: Community Inspired. Enterprise Trusted.” and portraits in the background.

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.

Hackropole graphic on a dark navy background, showing the platform name and a pixelated emblem resembling a temple.

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.

ANSSI