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arXiv 1601.01286cs.ITmath.IT
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合作广播信道的强保密性

Strong Secrecy for Cooperative Broadcast Channels

Ziv Goldfeld, Gerhard Kramer, Haim H. Permuter, Paul Cuff

摘要:

被认为是一个广播信道(BC)的解码器合作,通过一个单侧链路。一个公共消息和两个私人消息被发送,并且对协作辅助用户来说,发送给协作用户的私人消息应该是保密的。保密级别是根据强保密性来衡量的,即,一个消失的信息泄漏。通过使用双仓的秘密消息的码本的信道可分辨性为基础的代码,并通过使用似然编码器来选择发送的码字的容量区域上的内界导出。内界被证明是紧的半确定性和物理退化的BC和相应的BC没有保密约束的结果进行比较。Blackwell和Gaussian BC示例说明了保密性对速率区域的影响。不像没有保密的情况下,通过合作链路共享信息的私人消息是最佳的,我们的协议只传达部分共同和非机密的消息。由于保密要求,这种限制比通常的速率损失更多地降低了传输速率。提供了一个例子来说明这种损失。

英文摘要:

A broadcast channel (BC) where the decoders cooperate via a one-sided link is considered. One common and two private messages are transmitted and the private message to the cooperative user should be kept secret from the cooperation-aided user. The secrecy level is measured in terms of strong secrecy, i.e., a vanishing information leakage. An inner bound on the capacity region is derived by using a channel-resolvability-based code that double-bins the codebook of the secret message, and by using a likelihood encoder to choose the transmitted codeword. The inner bound is shown to be tight for semi-deterministic and physically degraded BCs and the results are compared to those of the corresponding BCs without a secrecy constraint. Blackwell and Gaussian BC examples illustrate the impact of secrecy on the rate regions. Unlike the case without secrecy, where sharing information about both private messages via the cooperative link is optimal, our protocol conveys parts of the common and non-confidential messages only. This restriction reduces the transmission rates more than the usual rate loss due to secrecy requirements. An example that illustrates this loss is provided.

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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