Which of the following descriptions of the principles of Alibaba Cloud SSL certificate private key...

Alibaba Cloud uses the built-in functionality of the SSL certificate service to encrypt and store the private key to certificates private key

The plaintext of Alibaba Cloud's private key is usually stored on disk and backed up regularly

Alibaba Cloud Certificate Service uses symmetric encryption to save the certificate private key

Alibaba Cloud Certificate Service keys are loaded Into memory in plaintext format ONLY when needed