Capacity bounds for broadcast channels with confidential messages
IEEE Transactions on Information Theory
Secrecy capacity region of a multiple-antenna Gaussian broadcast channel with confidential messages
IEEE Transactions on Information Theory
On the Secrecy Capacity of Fading Channels
IEEE Transactions on Information Theory
Information Theoretic Security
Foundations and Trends in Communications and Information Theory
EURASIP Journal on Wireless Communications and Networking - Special issue on wireless physical layer security
On the multi-antenna wiretap channel with delayed CSI at the transmitter
Proceedings of the 5th International ICST Conference on Performance Evaluation Methodologies and Tools
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We study the compound multi-input multi-output (MIMO) broadcast channel with confidential messages (BCC), where one transmitter sends a common message to two receivers and two confidential messages respectively to each receiver. The channel state may take one of a finite set of states, and the transmitter knows the state set but does not know the realization of the state. We study achievable rates with perfect secrecy in the high SNR regime by characterizing an achievable secrecy degree of freedom (s.d.o.f.) region for two models, the Gaussian MIMO-BCC and the ergodic fading multi-input single-output (MISO)-BCC without a common message. We show that by exploiting an additional temporal dimension due to state variation in the ergodic fading model, the achievable s.d.o.f, region can be significantly improved compared to the Gaussian model with a constant state, although at the price of a larger delay.