Multi-Receiver Wiretap Channel With Public and Confidential Messages

The authors study the multi-receiver wiretap channel with public and confidential messages. In this channel, there is a transmitter that wishes to communicate with two legitimate users in the presence of an external eavesdropper. The transmitter sends a pair of public and confidential messages to each legitimate user. While there are no secrecy constraints on the public messages, confidential messages need to be transmitted in perfect secrecy. They study the discrete memoryless multi-receiver wiretap channel as well as its Gaussian Multi-Input Multi-Output (MIMO) instance.