Transmitting Arbitrary Sources with Finite Error Over a Broadcast Channel with Confidential Communications

In this paper we classify what arbitrary sources can be transmitted over a discrete memoryless broadcast channel with confidential communications (DM-BCC). Despite allowing completely arbitrary sources and finite error, we show that necessary and sufficient conditions can be expressed in terms of traditional channel capacity regions. As a by-product we also determine the (ε, δ) -capacity region, and show that even in this more general setting source-channel separation is optimal for the DM-BCC as originally defined.