Multiaccess Channel with Partially Cooperating Encoders and Security Constraints
arXiv:1205.6852 · doi:10.1109/TIFS.2013.2263804
Abstract
We study a special case of Willems's two-user multi-access channel with partially cooperating encoders from a 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 (DM) case, we establish inner and outer bounds on the capacity-equivocation region. The inner bound is based on a combination of Willems's coding scheme, noise injection and additional binning that provides randomization for security. For the memoryless Gaussian model, we establish lower and upper bounds on the secrecy capacity. We also show that, under certain conditions, these bounds agree in some extreme cases of cooperation between the encoders. We illustrate our results through some numerical examples.
To appear in IEEE Transactions on Information Forensics and Security
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- On the Capacity of the 2-User Interference Channel with Transmitter Cooperation and Secrecy Constraints
- Outer Bounds on the Secrecy Capacity Region of the 2-user Z Interference Channel With Unidirectional Transmitter Cooperation
- On the Secrecy Capacity Region of the 2-user Z Interference Channel with Unidirectional Transmitter Cooperation
- Relay Broadcast Channel with Confidential Messages