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arXiv cs/0611129cs.ITmath.IT
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具有通知接收者的Shannon保密系统及其在窃听信道系统编码中的应用

Shannon's secrecy system with informed receivers and its application to systematic coding for wiretapped channels

Neri Merhav

摘要:

香农的保密系统中的设置进行了研究,其中合法的解码器和窃听器都可以访问与源相关的边信息序列,但窃听器通过比合法解码器的相应信道更嘈杂的信道接收编码信息和边信息,而合法解码器又与编码器共享秘密密钥。一个单字母的表征提供了可实现的区域中的空间的五个数字的优点:在窃听器的含糊度,关键率,在合法的接收器,编码信道的带宽扩展因子的源重建的失真,和平均传输成本(广义功率)。除了这是早期研究的延伸之外,它还提供了一个框架,用于研究存在窃听信道的系统代码的基本性能限制。最佳可实现的性能的系统码,然后比较一般的代码在几个方面,并给出了几个例子。

英文摘要:

Shannon's secrecy system is studied in a setting, where both the legitimate decoder and the wiretapper have access to side information sequences correlated to the source, but the wiretapper receives both the coded information and the side information via channels that are more noisy than the respective channels of the legitmate decoder, which in turn, also shares a secret key with the encoder. A single--letter characterization is provided for the achievable region in the space of five figures of merit: the equivocation at the wiretapper, the key rate, the distortion of the source reconstruction at the legitimate receiver, the bandwidth expansion factor of the coded channels, and the average transmission cost (generalized power). Beyond the fact that this is an extension of earlier studies, it also provides a framework for studying fundamental performance limits of systematic codes in the presence of a wiretap channel. The best achievable performance of systematic codes is then compared to that of a general code in several respects, and a few examples are given.

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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