The hint is given in the passage where Camellia has a specific type of cipher called the "Camellia Cipher"
Use the any Camellia cipher online decoder to retrieve the hidden text.
<img width="900" alt="image" src="https://github.com/lenebread/GiTxHextech-Challenge-Repo/assets/166520861/79132ade-91cd-446b-9671-18edace80b50">