2016weight 5.00nasilemak
Facebook Capture The Flag 2016
3 challenges with 4 published community solutions between them. Solution links go to CTFtime’s task page, which aggregates every writeup for a challenge - individual blog posts rot, the aggregator does not.
Full task list on CTFtimeCryptography2
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
Kazakhstan sticky (Crypto 300)
1 official solutionAlso written up in: opensource-thoughts.blogspot.sg
- crypto
Same technique in picoCTF: It's Not My Fault 2, StegoRSA, AES-ABC
Uncategorised1
The upstream scoreboard did not say, so neither do we.
Capture Mexico Tls
2 official solutionsAlso written up in: sonickun/ctf-crypto-writeups, sonickun/ctf-crypto-writeups