Secrecy in Gaussian MIMO bidirectional broadcast wiretap channels: Transmit strategies

Secrecy in broadcast channels with receiver side information

“…In this context, it is also known as the bidirectional broadcast wiretap channel (BBWC). Transmit strategies for the BBWC are also studied in [12,13]. Privacy within the bidirectional relay network is studied in [14,15].…”

Bidirectional broadcast channels with common and confidential messages

“…Since the receiving nodes can use their own messages from the previous phase for decoding, this channel differs from the classical broadcast channel scenario and is therefore called bidirectional broadcast channel (BBC) with common and confidential messages. Note that this differs from the wiretap scenario where the bidirectional communication itself should be secure from eavesdroppers outside the wireless network as for example studied in [16,17]. 1…”

LDPC Codes for the Gaussian Wiretap Channel

“…In [65], it is shown that using feedback for encoding is essential in Gaussian fullduplex two-way wiretap channels, while feedback can be ignored in the Gaussian half-duplex two-way relay channel with untrusted relays. More recently, secure transmission strategies have been studied for multiantenna two-way relay channels with network coding in the presence of eavesdroppers [66], [67]. By applying the analog network-coded relaying protocol, the end nodes exchange messages in two time slots.…”