2019no writeups on CTFtime
BCTF 2019 finals
9 challenges with 16 published solutions between them. CTFtime lists this event but has no writeups filed against it, so it is absent from the index CTFtime feeds. These were found in public repositories instead. Each link is pinned to the commit it was read from.
The event on CTFtimeUncategorised7
The upstream scoreboard did not say, so neither do we.
README en
5 official solutionsProductManager
3 official solutionsRceservice
2 official solutionsEvents
1 official solutionHr Admin Module
1 official solutionPdfme
1 official solutionProductsManager
1 official solution
Cryptography2
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
Oldschool
1 official solutionRivestShamirAdleman
1 official solution