2021from the authors’ own sites
Crowdstrike CTF 2021
3 challenges with 3 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 on the authors’ own sites instead.
Where these writeups liveCryptography2
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
Matrix [crypto]
1 official solutionModule Wow [crypto, reversing]
1 official solution
Uncategorised1
The upstream scoreboard did not say, so neither do we.
Portal
1 official solution