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Multiaccess Channel with Partially Cooperating Encoders and Security Constraints

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.
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Contributor : Abdellatif Zaidi Connect in order to contact the contributor
Submitted on : Friday, February 22, 2013 - 6:37:56 PM
Last modification on : Saturday, January 15, 2022 - 3:58:36 AM

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Zohaib Hassan Awan, Abdellatif Zaidi, Luc Vandendorpe. Multiaccess Channel with Partially Cooperating Encoders and Security Constraints. IEEE Transactions on Information Forensics and Security, Institute of Electrical and Electronics Engineers, 2013, 8 (7), pp.1243-1254. ⟨10.1109/TIFS.2013.2263804⟩. ⟨hal-00793708⟩



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