KS HackZone is the ultimate hub for competitive minds in cybersecurity. Explore a massive archive of real CTF event challenges from across the globe, solve them at your own pace, publish razor-sharp writeups, and climb the global leaderboard — FREE FOREVER.
$ nc kshackzone.com 31337
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A Capture The Flag is like a gym for hackers. You hunt down hidden flags by exploiting web bugs, reversing binaries, cracking ciphers, or digging through disk & memory images — all in a safe, legal sandbox.
We archive real CTF challenges from events worldwide so you can practice anytime, at your own pace. Solve, share writeups, learn from others — and maybe win a giveaway while you’re at it. All core features are 100% free.
These organizations champion open, hands-on security education. Their support helps us archive events, keep challenges live, and scale our free tooling for writeups and leaderboards.
Hand-picked from events worldwide. Different organizers, different tricks — sharper instincts for you.
Clear, reproducible solutions with code. The best explanations rise to the top so you learn faster.
Earn points for solving, writing, and helping others. Consistency wins — not just one lucky solve.
Climb the ladder by solving challenges, publishing writeups, and earning love reacts on those writeups. Every challenge type contributes equally — steady practice is how you rank up.
Unlock badges by hitting milestones in Web, Pwn, Reverse, Crypto, Forensics, and OSINT. Solve thresholds (e.g., 5 / 10 / 25+) in a category to level up your badge and showcase depth.
Publish consistently and write clearly to earn writeup badges — from publish counts (e.g., 3 / 10 / 25+) to community love milestones on your solutions. Great docs boost visibility across the site.
Get instant alerts when new challenges drop or fresh writeups go live. Swap hints, share wins, and connect with players from all skill levels — 24/7. Whether you’re stuck on a puzzle or showing off a solve, the community’s got your back.
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