A "symmetric" key means the same key is used to both encrypt and decrypt data. Imagine a locked chest. The developer puts game assets inside, locks the chest with a key, and then hides that key inside the game client itself (since the client needs to read the assets to run).
The key has moved from a static code snippet to a dynamic runtime challenge. And that, cryptographically speaking, is exactly how it should be. Have you successfully extracted Tower of Fantasy assets for a legitimate research project? Ensure you are using a throwaway account and an offline backup. The game’s anti-cheat does not differentiate between a harmless model viewer and a speed hack—both trigger the same alarms. tower of fantasy aes key
This is the central paradox of client-side encryption: A "symmetric" key means the same key is