dirname is the folder path where the model is located. If the parameter is discrete, it is unnecessary to specify params_filename, else you need to set the value of params_filename = '__params__'.
dirname is the folder path where the model is located. If the parameter is discrete, it is unnecessary to specify params_filename, else you need to set the value of params_filename to be '__params__'.
The key is stored in the `key` file, and the encrypted model file and server-side configuration file are stored in the `encrypt_server` directory.
client-side configuration file are stored in the `encrypt_client` directory.