https://2026.polyuctf.com/
PolyU x NuttyShell Cybersecurity CTF 2026 Ceremony
cybersecurityctfceremony
https://ctf101.org/
CTF Handbook
Capture the Flag Competition Wiki
ctfhandbook
https://www.lycorp.co.jp/ja/news/release/019784/
LINEヤフー、セキュリティ技術を競うコンテスト「LINE CTF 2025」を開催｜LINEヤフー株式会社
賞金総額1万ドル！コンテストを通じてセキュリティ領域のコミュニティ活性化・発展への寄与を⽬指す
ctf
https://ctfd.dkly.net/
CTF Platform
ctfplatform
https://bburky.com/ctf-shittyaddon-writeup/
ctf-shittyaddon-solution
ctfsolution
https://ctf.zeyu2001.com/2022/ctf.sg-ctf
CTF.SG CTF | CTFs
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https://saarsec.rocks/2025/10/02/FAUSTCTF-cake-configurator.html
FAUST CTF 2025 - cake-configurator
We got first blood on the COBOL-based cake configurator in this year's FAUST CTF.
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https://ctf-wiki.org/
简介 - CTF Wiki
ctfwiki
https://oooverflow.io/
OOO — DEF CON CTF
def conoooctf
https://hackhub.get-shell.com/
极核::CTF
极核靶场，一个专为网络安全爱好者和专业人士打造的免费漏洞靶场。
ctf
https://ctf.hkcert.org/
HKCERT CTF - 2025
Mar 12, 2026 - Qualifying Round 2025 DEC • 19TH - 21ST Final Round 2026 FEB • 6TH CTF - Scoreboard CTF - Scoreboard (Secondary Division) CTF - Scoreboard (Tertiary Division,...
ctf
https://ctftime.org/event/1877
CTFtime.org / Byte Bandits CTF 2023
A Beginner to Intermediate level CTF Competition held by Byte Bandits, IIT Indore’s academic CTF team. The event is a...
bytebanditsctf
https://2025.polyuctf.com/
PolyU x NuttyShell Cybersecurity CTF 2025 Ceremony
cybersecurityctfceremony
https://ctflearn.com/
Home - CTFlearn - CTF Practice - CTF Problems - CTF Challenges
Learn and compete on CTFlearn
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https://blog.cryptohack.org/
CryptoHack Blog | Updates about the CryptoHack platform, cryptography news, and CTF writeups.
Updates about the CryptoHack platform, cryptography news, and CTF writeups.
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https://ctf.spook.dev/
CHES 2020 CTF: Spook SCA
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https://h-flash.com/ami-ctf-animation/
Ami CTF Animation - Hentai Flash Games
A Flash animation I've been workin' on for a short while recently. Ami and Aniece making some sweet tender love before Ami symbiotically merges Aniece t...
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https://ctf.robotattack.org/
The ROBOT CTF - Return of Bleichenbacher's Oracle Threat
Return of Bleichenbacher's Oracle Threat - ROBOT is the return of a 19-year-old vulnerability that allows performing RSA decryption and signing operations with...
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https://archive.ooo/
Welcome | OOO archive | DEF CON CTF
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https://ctf.sigpwny.com/
Pwny CTF
ctf
https://capturetheflag.withgoogle.com/
Google CTF
googlectf
https://www.cryptotaxforum.org/ctf/agenda-and-speakers-2023
CTF 2023
ctf
https://blog.pspaul.de/posts/pwn-ctf-2018-converter/
P.W.N. CTF 2018: Converter (Web/Crypto 200)
web, crypto, misc / Converter
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https://www.ctf-fce.ca/
Home - CTF-FCE
Apr 15, 2026 - CTF/FCE, The national, bilingual federation of teacher organizations leading a vision for quality publicly funded public education.
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https://sigflag.at/
SIGFLAG | SIGFLAG is a CTF team based in Linz, organised by motivated students of JKU Linz.
SIGFLAG is a CTF team based in Linz, organised by motivated students of JKU Linz.
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https://flu.xxx/
Hack.lu CTF 2026
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https://enigma-agent.com/
EnIGMA | Enhanced Interactive Generative Model Agent for CTF Challenges
This is the landing and main page of EnIGMA
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https://nationalpost.com/news/canada/privy-council-office-spending-canadian-taxpayers-federation
Privy Council Office wasting millions on consultants: CTF | National Post
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https://skullctf.com/
The Skull CTF
Can You Hack Into ATtiny Brain? Mind-bending hardware riddle for Datasheet masochists
skullctf
https://ctf.kanxue.com/
CTF-KCTF竞赛平台靶场
CTF-KCTF竞赛平台靶场，专注于安全技能训练、CTF 挑战赛、逆向破解、二进制分析、漏洞挖掘与安全大赛。
ctf
https://zaufanatrzeciastrona.pl/post/jak-napisac-ciekawe-crackme-na-ctf-instrukcja-krok-po-kroku/
Jak napisać ciekawe CrackMe na CTF – instrukcja krok po kroku | Zaufana Trzecia Strona
Niezależne źródło wiadomości o świecie bezpieczeństwa IT
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Carys - Fanvue
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https://www.haproxy.com/user-spotlight-series/preventing-traffic-fingerprinting-in-capture-the-flag-competitions
Preventing Traffic Fingerprinting in CTF Competitions
Aug 27, 2025 - Discover how FAUST CTF uses HAProxy and iptables TPROXY to prevent traffic fingerprinting in attack/defense Capture the Flag competitions.
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https://ctftime.org/stats/
CTFtime.org / CTF teams
Capture The Flag, CTF teams, CTF ratings, CTF archive, CTF writeups
ctfteams
https://gynvael.coldwind.pl/?lang=pl&id=806
OSINT CTF i webinary organizowane przez NASK - 24-25 listopada 2025 - gynvael.coldwind//vx.log
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https://nyu-llm-ctf.github.io/
NYU CTF Bench
nyuctfbench
https://ctf.zeyu2001.com/2021/zh3ro-ctf-v2
Zh3ro CTF V2 | CTFs
Web and Crypto challenges from Zh3r0 CTF V2 hosted from 4 June - 6 June 2021!
ctfv2
https://blog.wokwi.com/capture-the-flag-shitty-add-on/
CTF Shitty Add-On - An ATtiny85 Hardware Challenge For The Brave!
May 19, 2021 - Capture The Flag by finding your way into the internals of the ATtiny85 chip and turn the LED on - the story behind the hardware, and how to make your own.
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Sponsored https://www.comixharem.com/
Comix Harem
https://ctf.zeyu2001.com/
Zeyu's CTF Writeups | CTFs
Here you can find writeups from various CTFs that I've participated in.
ctfwriteups
https://ctf.in.th/
CTF Thailand | Capture the Flag Thailand
Capture the Flag Thailand
capture the flagctfthailand
https://onehack.st/t/my-teams-stuck-on-a-ctf-puzzle-anyone-up-to-help/321238
🎯 My Team's Stuck On A CTF Puzzle — Anyone Up To Help? - Discussion & Solutions - OneHack a.k.a...
Apr 28, 2026 - :thread: Help — Stuck On A CTF Crypto Puzzle (“Kente Multivariate”) My team’s been at this for hours. Anyone who’s seen this pattern before — please drop a...
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https://ctftime.org/
CTFtime.org / All about CTF (Capture The Flag)
Capture The Flag, CTF teams, CTF ratings, CTF archive, CTF writeups
capture the flagall aboutctf
https://polyuctf.com/
PolyU CTF Team – a.k.a NuttyShell
ctfteam
https://cipher-ctf.org/
Cipher CTF – Hiburan & Teknologi Digital - Artikel hiburan dan teknologi dengan fokus pada...
Artikel hiburan dan teknologi dengan fokus pada tantangan digital, kompetisi, serta kreativitas online
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