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arXiv 1106.4286cs.ITcs.CRmath.IT
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具有公开和机密信息的多接收者窃听信道

Multi-receiver Wiretap Channel with Public and Confidential Messages

Ersen Ekrem, Sennur Ulukus

摘要:

本文研究了具有公共和机密信息的多接收者窃听信道。在该信道中,存在希望在外部窃听者存在的情况下与两个合法用户通信的发送器。发送器向每个合法用户发送一对公共和机密消息。虽然对公共消息没有保密限制,但机密消息需要以完全保密的方式传输。研究了离散无记忆多接收机窃听信道及其高斯多输入多输出(MIMO)情况。首先,我们考虑退化的离散无记忆信道,并通过使用一个可实现的方案,使用叠加编码和分箱获得的容量区域的内界。接下来,我们得到了一个外边界,并表明,这个外边界部分匹配的内边界,退化的信道模型的容量区域提供了部分表征。其次,我们得到了一个内界的一般,不一定退化,离散无记忆信道,通过使用马顿的内界,叠加编码,速率分裂和binning。第三,我们考虑了退化的高斯MIMO信道,并表明,为了评估内外界,只考虑联合高斯辅助随机变量和信道输入是足够的。由于内界和外界部分匹配,这些充分性结果提供了退化高斯MIMO信道的容量区域的部分表征。最后,我们提供了一个一般的,不一定退化,高斯MIMO多接收机窃听信道的容量区域的内界。

英文摘要:

We study the multi-receiver wiretap channel with public and confidential messages. In this channel, there is a transmitter that wishes to communicate with two legitimate users in the presence of an external eavesdropper. The transmitter sends a pair of public and confidential messages to each legitimate user. While there are no secrecy constraints on the public messages, confidential messages need to be transmitted in perfect secrecy. We study the discrete memoryless multi-receiver wiretap channel as well as its Gaussian multi-input multi-output (MIMO) instance. First, we consider the degraded discrete memoryless channel, and obtain an inner bound for the capacity region by using an achievable scheme that uses superposition coding and binning. Next, we obtain an outer bound, and show that this outer bound partially matches the inner bound, providing a partial characterization for the capacity region of the degraded channel model. Second, we obtain an inner bound for the general, not necessarily degraded, discrete memoryless channel by using Marton's inner bound, superposition coding, rate-splitting and binning. Third, we consider the degraded Gaussian MIMO channel, and show that, to evaluate both the inner and outer bounds, considering only jointly Gaussian auxiliary random variables and channel input is sufficient. Since the inner and outer bounds partially match, these sufficiency results provide a partial characterization of the capacity region of the degraded Gaussian MIMO channel. Finally, we provide an inner bound for the capacity region of the general, not necessarily degraded, Gaussian MIMO multi-receiver wiretap channel.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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