2025found by harvest
Ctrl+Space CTF Quals
3 challenges with 3 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 listingCryptography1
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.
Solve it with:Cipher identifier and automatic decoderVigenere cipher solver with automatic key recoveryRSA decryption and attack runnerWiener’s attack on small RSA private exponentsIn-browser hash cracker with rule transformsLearn: Classical ciphers and frequency analysisLearn: RSA and the parameters that break it
Chall
1 official solutionAlso written up in: sajjadium/ctf-archives
Uncategorised1
The upstream scoreboard did not say, so neither do we.
Satellite Aas
1 official solutionAlso written up in: riccardosarro/ctf-writeups
Misc1
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
Solve it with:Brainfuck and esolang decoderCipher identifier and automatic decoderRegex tester with match offsets and capture groupsLearn: Recognising encodings
Stack Building
1 official solutionAlso written up in: sajjadium/ctf-archives