By default, the server does not automatically encrypt uploaded data.

Users can enable server-side encryption by setting the encryption policy of the storage space. After the configuration is completed, OSS will automatically encrypt newly uploaded data according to the configured encryption method.

For existing data, OSS will not automatically encrypt it unless the user explicitly specifies that the data needs to be encrypted. In addition, OSS also supports client-side encryption, which means data is encrypted locally before being uploaded to OSS, which requires users to manage the encryption keys themselves.