This is the way all modern SSD work. The encryption is done at the controller level. This can complicate data recovery in the event of certain failures yes. No sandisk nor any other ssd manufacturer I know of hands out the encryption keys. The encryption key is generated randomly by the controller.
The issue I was trying to point out is that yes the data on the ssd in encrypted. There is no access control however so if your computer is set to have no password, encrypted or not your data is accessible by anyone with access to the computer. If you want encryption with access control you will need to set windows or bios passwords or use some other third part encryption application.
