A title key protection system includes a title key with recordable media
content; storage in a repository is not required. The title key is
decrypted when needed by a clearinghouse, and then re-encrypted. The
title key confers rights from the content owners to the user to play and
copy the content for personal use. A user downloads encrypted content
from a content repository. The user's media recording device extracts an
encrypted title key from the content and obtains a media key block and
media ID from the physical media on which the content will be recorded.
The encrypted title key, media key block, and media ID are transmitted to
a clearinghouse. The clearinghouse decrypts the title key and derives a
media unique key from the media key block and media ID. The clearinghouse
re-encrypts the title key with the media unique key and returns this
re-encrypted title key to the media recording device for recording with
the content on the physical media.