2025from public repositories
Cyberq CTFae 2025
21 challenges with 26 published solutions between them. CTFtime has no listing for this event at all, so nothing built on CTFtime can show what it was made of. These writeups were found in public repositories instead. Each link is pinned to the commit it was read from.
Where these writeups liveUncategorised15
The upstream scoreboard did not say, so neither do we.
HashTag Broken
2 official solutionsOops I did it again
2 official solutionsSimple Oracle
2 official solutionsBackdoor Discovery
1 official solutionDouble Affine Cipher
1 official solutionDouble Trouble
1 official solutionLWEak Sauce
1 official solutionNot Numbers
1 official solutionPII Leak Detector
1 official solutionPrivacy Vulnerability Classifier
1 official solutionRSA Basics
1 official solutionRSA nity Check Failed
1 official solutionRSA Prime is a crime
1 official solutionTime to decode
1 official solution
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.
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
Groundhog Day
2 official solutionsQuotes
2 official solutionsDSAstrous
1 official solutionECDSA
1 official solutionGradient Descent into Secret Recovery
1 official solutionOnly a few bits are enough
1 official solution