An encryption arrangement for television programs or other digital
programming consistent with certain embodiments sends content completely
in-the-clear and also encrypts only a portion of the content required for
full presentation of a television program. The arrangement allows
interoperability between new TVs that can handle encryption and older TVs
that cannot. Regulations prevent new TVs from receiving only the clear
content. New TVs are made to descramble the encrypted portions of the
content. Older legacy TVs can receive all the content in the clear. The
encrypted portions are chosen so that dramatically less bandwidth is
required as compared to full dual carriage of the content. Licensing
provisions relating to the encryption technology can be used to control
unauthorized use of content. This abstract is not to be considered
limiting, since other embodiments may deviate from the features described
in this abstract.