How does the communication encryption work?
The communication is encrypted through AES and the method is as follows.
1. The server creates a random session key.
2. The sever encrypts the randomly created session key with a fixed key and sends it to the device.
3. The device decrypts the encrypted session key with a fixed key.
4. Then the communication is encrypted through the session key.

If you have any questions about AES, please feel free to contact Chiyu for more details.
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