Appellation d'Origine Protégée

crypto symmetric FCSC 2024 solved on

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Description

A consumer product labeling company has decided to certify its products using highly innovative NFTs. The company didn’t want to do things halfway, so they created their own blockchain.

Your friend, a sparkling wine producer, wants to take advantage of this to upgrade. With his computer skills, he managed to find a “pseudo-random” permutation used in the blockchain, and needs to solve the CICO problem to finally be able to sell champagne.

Can you help him?

Files

Author

graniter

Challenge Instructions

  1. First, download docker-compose.yml:
    curl https://hackropole.fr/challenges/fcsc2024-crypto-appellation-origine-protegee/docker-compose.public.yml -o docker-compose.yml
  2. Launch the challenge by executing in the same folder:
    docker compose up
  3. Then, in another console, access the challenge with Netcat:
    nc localhost 4000
⚠️ Important: You must solve the challenge by interacting with the Docker container through the exposed network port. Any other way is not considered valid.

In case you encounter problems, please consult the FAQ.

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