2022from public repositories
gisecCTF 2022
5 challenges with 5 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 liveCryptography5
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
solve 1B x0r
1 official solutionAlso written up in: heapbytes/CTF-writeups
Solve Rsa01
1 official solutionAlso written up in: heapbytes/CTF-writeups
Solve Rsa02
1 official solutionAlso written up in: heapbytes/CTF-writeups
Solve Rsa03
1 official solutionAlso written up in: heapbytes/CTF-writeups
Solve Rsa04
1 official solutionAlso written up in: heapbytes/CTF-writeups