2020from public repositories
Nactf 2020
5 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 liveCryptography4
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
Error2
3 official solutionsAlso written up in: CTF-STeam/ctf-writeups, HadiFazelinia/CTF-Challenges, RaaCT0R/CTF-Challenges
Error 1
2 official solutionsAlso written up in: HadiFazelinia/CTF-Challenges, RaaCT0R/CTF-Challenges
Random Number Generator
2 official solutionsAlso written up in: HadiFazelinia/CTF-Challenges, RaaCT0R/CTF-Challenges
CryptoWriteups
1 official solutionAlso written up in: blatchley/CTF_Writeups
Uncategorised1
The upstream scoreboard did not say, so neither do we.
Oligar's Tricky RSA
2 official solutionsAlso written up in: s4nkx0k/CTFs, s4nkx0k/CTFs