2024from public repositories
DDCTF Semifinal Round 2024
7 challenges with 10 published solutions between them. The writeups for this event were found in public repositories. Each link is pinned to the commit it was read from.
Where these writeups liveCryptography7
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
Bixis Codes
2 official solutionsAlso written up in: tranminhprvt01/CTF-writeups, tranminhprvt01/CTF-writeups
Math test
2 official solutionsAlso written up in: tranminhprvt01/CTF-writeups, tranminhprvt01/CTF-writeups
RSHint
2 official solutionsAlso written up in: tranminhprvt01/CTF-writeups, tranminhprvt01/CTF-writeups
Challenge Math Test
1 official solutionAlso written up in: tranminhprvt01/CTF-writeups
Also written up in: tranminhprvt01/CTF-writeups
NIST New RSA
1 official solutionAlso written up in: tranminhprvt01/CTF-writeups
Wonton soup
1 official solutionAlso written up in: tranminhprvt01/CTF-writeups