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This is a collection of sites about security.
The order is alphabetical.
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Education,Training
No Image Name URL Description Tag
1 Bugcrowd https://www.bugcrowd.com/ A bug bounty platform where ethical hackers can find and report vulnerabilities in products and services from various companies. Hackers earn rewards for finding and reporting valid security flaws.sss
  • English
  • Tools
  • Hacking
  • CTF
  • Education
2 CTFtime https://ctftime.org/ A site dedicated to tracking upcoming CTF competitions around the world. It also includes rankings and scores from past events, making it a great resource for discovering new CTF events.sss
  • English
  • Hacking
  • CTF
  • Education
3 Cyber Security Challenges https://cybersecuritychallenge.org.uk/ An educational competition and challenge platform aimed at encouraging young people to pursue careers in cybersecurity. It includes a variety of challenges from basic to expert-level.sss
  • English
  • Hacking
  • CTF
  • Education
4 Hacking the cloud https://hackingthe.cloud/ AWSなどのCloud環境の攻撃手法をボランティアで纏めているサイトです。 防御方法などもこれからは記載していくようです。
  • English
  • Hacking
  • Education
  • Pentest
  • Information Provision
  • Cloud
  • AWS
  • AZUL
  • GCP
5 HackInTheBox https://www.hitb.org/ A well-known cybersecurity conference and community platform that includes a variety of events, security talks, and technical challenges. It’s a great place to explore cutting-edge security topics.sss
  • English
  • Hacking
  • CTF
  • Education
6 hackthebox https://www.hackthebox.com/ An online platform offering real-world penetration testing challenges and CTF-style tasks. Users can practice hacking skills in a variety of categories like web, cryptography, and reverse engineering.sss
  • English
  • Hacking
  • CTF
  • Education
7 KENRO https://flatt.tech/kenro/ This is a platform that enables security learning to take root through online exercises that specialize in hands-on learning.It allows software developers to learn security not only through classroom lectures, but also through actual hands-on experience.sss
  • Japanese
  • Tools
  • Hacking
  • Education
  • Information Provision
8 OverTheWire https://overthewire.org/ A collection of beginner-friendly CTF-style challenges designed to teach the fundamentals of hacking and penetration testing. It includes a wide variety of game-like exercises for users to learn and practice their skills.sss
  • English
9 OverTheWire: Bandit https://overthewire.org/wargames/bandit/ A beginner-friendly series of challenges that teach fundamental concepts in Linux and security using the Bandit game.sss
  • English
10 Root Me https://www.root-me.org/ A platform offering a variety of challenges related to penetration testing, security, and cryptography. Users can practice ethical hacking on real-world simulations of websites and systems.sss
  • English
11 SANS NetWars https://www.sans.org/cyber-ranges/ An interactive platform provided by the SANS Institute, offering virtual environments and cybersecurity challenges in areas like incident response, malware analysis, and penetration testing.sss
  • English
12 Synack https://www.synack.com/ A cybersecurity company that runs a crowdsourced security testing platform. Synack provides opportunities for ethical hackers to engage in bug bounty programs and vulnerability testing for clients in exchange for rewards.sss
  • English
13 TryHackMe https://tryhackme.com/ An interactive cybersecurity learning platform with beginner-friendly to advanced-level challenges. It offers virtual labs and environments to practice different skills in offensive and defensive security.sss
  • English
14 VulnHub https://www.vulnhub.com/ A platform offering downloadable vulnerable machines that allow users to practice their penetration testing and hacking skills. Each machine has its own set of challenges designed to teach different aspects of hacking.sss
  • English
15 Cross-Origin Resource Sharing, CORS https://developer.mozilla.org/ja/docs/Web/HTTP/Guides/CORS オリジン間リソース共有 (CORS)についてわかりやすく説明してくれているページです。セキュリティエンジニアやウェブ開発を行うエンジニアは一回読んでおくと、とても勉強になります。
  • Japanese
  • Education
  • Information Provision