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Public archive
Technical records and post-event analysis
Reproducible solves, failed turns, and the detail needed to learn from both.
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22 writeups
2026/dicectf-2026/crypto/plane-or-exchange.md
Alice and Bob had a brief exchange, and now they know something which I do not. Would you please help me to drop some Eves?
2026/srdnlen-ctf-quals-2026/crypto/fhaes.md
Here it is! Fully Homomorphic AES encryption finally made practical. This is a remote challenge, you can connect to the service with: nc fhaes.challs.srdnlen.it 1337
2026/0xfun-ctf-2026/crypto/baby-hawk.md
hawk meets his cousin can they find the right basis?
2026/wannagame-2026/blockchain/wickedcraft.md
A blockchain challenge writeup from WannaGame 2026.
2025/pwnsec-ctf-2025/crypto/opera.md
Writer was too lazy to write a description, so here's this video: https://www.youtube.com/watch?v=lVlgMEFu1PI
2025/risky-chain-2025/misc/risc-v.md
Metal to the future! nc riskychain.challs.infobahnc.tf 1337
2025/v1t-ctf-2025/misc/talking-duck.md
Bro this duck is talking to me or something? I'm high or what?? Attachment: https://drive.google.com/file/d/1XOVJwPqHTZBRRUiuve8E1VwBSmMyB4Us/view?usp=sharing
2025/v1t-ctf-2025/misc/specimen-512.md
An unmarked data file was recovered from an abandoned research server labeled only as Specimen 512 . No accompanying documentation, no metadata, and no obvious contents — just a massive file filled with strange sequences. Some say it hides
2025/v1t-ctf-2025/rev/duck-rpg.md
Can you patch the batch to get the secret ending of the game ?
2025/v1t-ctf-2025/osint/the-forgotten-inventory.md
In the summer of 2007, a massive archive quietly surfaced - a meticulous ledger of items that once rolled across desert sands under foreign command. The file was structured, line after line, page after page, each entry tied to a unit whose
2025/osu-gaming-ctf-2025/crypto/please-nominate.md
ok this time i'm going to be a bit more nice and personal when sending my message
2025/imaginaryctf-2025/misc/certificate.md
As a thank you for playing our CTF, we're giving out participation certificates! Each one comes with a custom flag, but I bet you can't get the flag belonging to Eth007!
They can't leak what they don't know Please don't test your payloads on remote; use your own OpenRouter key. nc whoami.chal.imaginaryctf.org 1337
2025/ictf-2025/misc/significant.md
The signpost knows where it is at all times. It knows this because it knows where it isn't, by subtracting where it is, from where it isn't, or where it isn't, from where it is, whichever is greater. Consequently, the position where it is,
2025/nnsctf-2025/blockchain/huffameg.md
I don't understand, this just needs to return true! Hey Alexa, play "Tante Sofies sinte vise" until we've solved this challenge...
2025/nnsctf-2025/rev/breaker.md
Did you know that "breaking" a program can mean more than one thing? GDB certainly has its own idea of what that means. Unfortunately, a cat ran across my keyboard in the middle of debugging, and now everything looks like nonsense. Can you
2025/nnsctf-2025/crypto/live-laugh-love.md
Multiple unknowns and only a single equation... You are doomed!
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