Crypto CTF 2025
53 challenges with 97 published solutions between them. No writeups were ever filed against this event's listing, so its solutions were found in public repositories instead. Each link is pinned to the commit it was read from.
The event listingUncategorised47
The upstream scoreboard did not say, so neither do we.
Mancity
7 official solutionsAlso written up in: tl2cents/CTF-Writeups, silentzer0/CTFtime-Writeups, a-p-n/CTF-solutions, a-p-n/CTF-solutions, a-p-n/CTF-solutions, atuc17/CTF, silentzer0/CTFtime-Writeups
Vinad
5 official solutionsAlso written up in: silentzer0/CTFtime-Writeups, Hiroki6/ctf-writeups, a-p-n/CTF-solutions, atuc17/CTF, silentzer0/CTFtime-Writeups
Interpol
4 official solutionsAlso written up in: silentzer0/CTFtime-Writeups, Hiroki6/ctf-writeups, atuc17/CTF, silentzer0/CTFtime-Writeups
Matemith
4 official solutionsAlso written up in: a-p-n/CTF-solutions, atuc17/CTF, a-p-n/CTF-solutions, atuc17/CTF
Mechanic
4 official solutionsAlso written up in: Hiroki6/ctf-writeups, silentzer0/CTFtime-Writeups, Hiroki6/ctf-writeups, silentzer0/CTFtime-Writeups
Also written up in: atuc17/CTF, atuc17/CTF, atuc17/CTF
Goliver II
3 official solutionsAlso written up in: tl2cents/CTF-Writeups, tl2cents/CTF-Writeups, tl2cents/CTF-Writeups
Snails
3 official solutionsAlso written up in: tl2cents/CTF-Writeups, tl2cents/CTF-Writeups, tl2cents/CTF-Writeups
Vainrat
3 official solutionsAlso written up in: Hiroki6/ctf-writeups, Hiroki6/ctf-writeups, atuc17/CTF
Also written up in: google/google-ctf, google/google-ctf
AliceSigSlip
2 official solutionsAlso written up in: tl2cents/CTF-Writeups, tl2cents/CTF-Writeups
Also written up in: tl2cents/CTF-Writeups, tl2cents/CTF-Writeups
Juliax
2 official solutionsAlso written up in: a-p-n/CTF-solutions, a-p-n/CTF-solutions
Question 1
2 official solutionsAlso written up in: atuc17/CTF, atuc17/CTF
Question 4 1
2 official solutionsAlso written up in: atuc17/CTF, atuc17/CTF
Question 5
2 official solutionsAlso written up in: atuc17/CTF, atuc17/CTF
Question 7
2 official solutionsAlso written up in: atuc17/CTF, atuc17/CTF
Server
2 official solutionsAlso written up in: tl2cents/CTF-Writeups, tvdat20004/CTF_write-up
Skipjack
2 official solutionsAlso written up in: atuc17/CTF, atuc17/CTF
Sobata
2 official solutionsAlso written up in: tl2cents/CTF-Writeups, tl2cents/CTF-Writeups
Sobata II
2 official solutionsAlso written up in: tl2cents/CTF-Writeups, tl2cents/CTF-Writeups
Also written up in: atuc17/CTF
Also written up in: atuc17/CTF
ASIS Primes
1 official solutionAlso written up in: a-p-n/CTF-solutions
Chall
1 official solutionAlso written up in: VaggelisDaPro/Writeups
Copperbox
1 official solutionAlso written up in: tvdat20004/CTF_write-up
Cryptofox Rsa Problem
1 official solutionAlso written up in: atuc17/CTF
Cryptofox Xsl Problem
1 official solutionAlso written up in: atuc17/CTF
Cryptofox2025
1 official solutionAlso written up in: atuc17/CTF
Decrypt
1 official solutionAlso written up in: HeroGamers/CTF
Exp Cmd
1 official solutionAlso written up in: tl2cents/CTF-Writeups
HardPBKDF statements
1 official solutionAlso written up in: atuc17/CTF
Hoshi
1 official solutionAlso written up in: a-p-n/CTF-solutions
Krivizna New
1 official solutionAlso written up in: atuc17/CTF
Leptocole
1 official solutionAlso written up in: tl2cents/CTF-Writeups
Local Solver
1 official solutionAlso written up in: tl2cents/CTF-Writeups
Manuscript
1 official solutionAlso written up in: google/google-ctf
Nahan
1 official solutionAlso written up in: tl2cents/CTF-Writeups
Output
1 official solutionAlso written up in: a-p-n/CTF-solutions
Also written up in: atuc17/CTF
Solvec0
1 official solutionAlso written up in: marko213/ctf-writeups
Solvec1
1 official solutionAlso written up in: marko213/ctf-writeups
Solvec2
1 official solutionAlso written up in: marko213/ctf-writeups
Time Estimator
1 official solutionAlso written up in: tl2cents/CTF-Writeups
Twin Oracles
1 official solutionAlso written up in: tvdat20004/CTF_write-up
US5003597
1 official solutionAlso written up in: google/google-ctf
Verilicious
1 official solutionAlso written up in: tvdat20004/CTF_write-up
Cryptography6
Recover a plaintext or a key from something that was supposed to protect it. In practice: identify the scheme, find the parameter the author got wrong, exploit it.
Also written up in: HeroGamers/CTF, HeroGamers/CTF, HeroGamers/CTF, HeroGamers/CTF, HeroGamers/CTF, patorsiang/ctf-writeups
Dathash or Not Dathash
1 official solutionAlso written up in: c240030/openArchiveCTF
Elliptic Contribution
1 official solutionAlso written up in: c240030/openArchiveCTF
Stones
1 official solutionAlso written up in: c240030/openArchiveCTF
Also written up in: MeilingLiu1997/CTF-Writeups
Test Recon
1 official solutionAlso written up in: patorsiang/ctf-writeups