Information Theory and Reliable Communication
Information Theory and Reliable Communication
Secrecy capacity of a class of orthogonal relay eavesdropper channels
EURASIP Journal on Wireless Communications and Networking - Special issue on wireless physical layer security
A note on the secrecy capacity of the multiple-antenna wiretap channel
IEEE Transactions on Information Theory
Secure transmission with multiple antennas I: the MISOME wiretap channel
IEEE Transactions on Information Theory
Secure transmission with multiple antennas: part II: the MIMOME wiretap channel
IEEE Transactions on Information Theory
The Relay–Eavesdropper Channel: Cooperation for Secrecy
IEEE Transactions on Information Theory
The Gaussian Multiple Access Wire-Tap Channel
IEEE Transactions on Information Theory
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We study a special case of Willems's two-user multiaccess channel with partially cooperating encoders from security perspective. This model differs from Willems's setup in that only one encoder, Encoder 1, is allowed to conference, Encoder 2 does not transmit any message, and there is an additional passive eavesdropper from whom the communication should be kept secret. For the discrete memoryless case, we establish inner and outer bounds on the rate-equivocation region. Furthermore, we show that these bounds coincide in the case of perfect secrecy, and so we characterize fully the secrecy capacity. For the Gaussian model, we establish lower and upper bounds on the perfect secrecy rate. We also show that these bounds agree in some extreme cases of cooperation between encoders. We illustrate our results through some numerical examples.