Secure communication between set-top box and smart card for fair use in DTV broadcasting

Existing secure communication mechanisms between set-top box and smart card in digital television broadcasting are unfair and inconvenient since the subscribers cannot receive programs for themselves on any set-top boxes owned. In this paper, a novel scheme for fair use is presented to receive programs for subscribers themselves on any set-top boxes. Moreover, the proposed scheme can prevent McCormac Hack and smart card cloning problems which are serious threats in digital television broadcasting.