2020from public repositories
Hackasatquals 2020
6 challenges with 6 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 in public repositories instead. Each link is pinned to the commit it was read from.
Where these writeups liveUncategorised5
The upstream scoreboard did not say, so neither do we.
1201 Alarm
1 official solutionGood Plan Great Plan
1 official solutionGround Control To Major Tom
1 official solutionMy 0x20
1 official solutionTalk To Me Goose
1 official solution
Cryptography1
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
Leaky Crypto
1 official solution