Category: crypto
Author: feltf
I asked ChatCheapLeakD to implement a deterministic ECDSA scheme following the specifications outlined in RFC 6979. As always, its implementation surpassed my expectations.
After examining the intricate generated masterpiece, I made the decision to deploy an online timer that utilizes the generated ECDSA implementation to sign its responses.
Feeling a bit too confident, I went ahead and added a flag command, which returns the flag if provided with a valid signature. I'm willing to bet you won't be able to obtain the flag... or perhaps you can?
Launch challenge:
curl -sSL https://raw.githubusercontent.com/cybermouflons/CCSC-CTF-2023/master/crypto/secure-timer/docker-compose.yml | docker compose -f - up -d
Shutdown challenge:
curl -sSL https://raw.githubusercontent.com/cybermouflons/CCSC-CTF-2023/master/crypto/secure-timer/docker-compose.yml | docker compose -f - down