Handbrake is not intended or equipped to deal with commercial DVDs or BDs, despite what a lot of websites promise. It does not deal with encryption. While it is possible to add decryption using third-party libraries, it is not supported by the handbrake team, and has not been for over a decade.
If a website recommends handbrake for ripping disks, consider just how "up to date" that websites other recommendations might be.