2021from public repositories
IDEH Writeups 2021
18 challenges with 18 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 liveUncategorised17
The upstream scoreboard did not say, so neither do we.
A Pessimistic Life
1 official solutionAlien Message
1 official solutionb4ack To R0ME
1 official solutionCapture It
1 official solutionCrisis hidden bissnes
1 official solutionDo I KNOW you?
1 official solutionHistory
1 official solutionInspect It
1 official solutionInvestigator
1 official solutionNUMBERS
1 official solutionPhishing Email
1 official solutionPokemon
1 official solutionReal Sick Adult
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
What U Have Done
1 official solution