2026from public repositories
laCTF slow gold 2026
12 challenges with 13 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 liveCryptography12
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
Sha256
2 official solutionsAdder 32bit
1 official solutionAes 128
1 official solutionAes 192
1 official solutionAes 256
1 official solutionAES non expanded
1 official solutionEmp Ot
1 official solutionEmp Tool
1 official solutionKeccak f
1 official solutionSha 1
1 official solutionSha 256 Big
1 official solutionSha512
1 official solution