Comment by ekelsen

How would your scheme work? You use RSA to encrypt the entire thing? Or you use it to get a key for a block cipher and then use that?

I feel like either way, you'd need the key to be different for every CD, otherwise you could just share the shared key. But if the encryption of every CD is different, why not just share the block cipher key directly? They can have a list of CDs and the associated key(s).

What additional security or functionality does an RSA like step add here?