MIMO Gaussian broadcast channels with private and confidential messages and with receiver side information

In this paper the two-receiver MIMO Gaussian broadcast channel with private and confidential messages and receiver side information is studied. In this communication scenario, each receiver is interested in one private and one confidential message having the other private message as side information for decoding available. Each confidential message is exclusively intended for one receiver and must therefore be kept secret from the other receiver. A complete characterization of the secrecy capacity region is established using channel enhancement arguments and an extremal entropy inequality.