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arXiv 1002.1313cs.ITcs.CRmath.IT
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快衰落信道下的半双工主动发射码丢弃:一种块马尔可夫Wyner秘密编码方案

Half-Duplex Active Eavesdropping in Fast Fading Channels: A Block-Markov Wyner Secrecy Encoding Scheme

George T. Amariucai, Shuangqing Wei

摘要:

本文研究了快衰落信道下的半双工主动窃听问题。主动窃听者是一个比传统窃听者更强大的对手。它可以在两种功能模式之间进行选择:窃听合法方之间的传输(Ex模式)和干扰它(Jx模式)-活动窃听者不能在全双工模式下工作。我们考虑一个保守的情况下,当主动窃听者可以选择其策略的基础上合法的发射机-接收机对的策略-因此,发射机和合法的接收机必须计划最坏的情况。我们表明,传统的物理层保密方法表现不佳(如果有的话),我们引入了一种新的编码方案,基于非常有限和不安全的反馈-块马尔可夫Wyner(宝马)编码方案-它优于目前可用的任何方案。

英文摘要:

In this paper we study the problem of half-duplex active eavesdropping in fast fading channels. The active eavesdropper is a more powerful adversary than the classical eavesdropper. It can choose between two functional modes: eavesdropping the transmission between the legitimate parties (Ex mode), and jamming it (Jx mode) -- the active eavesdropper cannot function in full duplex mode. We consider a conservative scenario, when the active eavesdropper can choose its strategy based on the legitimate transmitter-receiver pair's strategy -- and thus the transmitter and legitimate receiver have to plan for the worst. We show that conventional physical-layer secrecy approaches perform poorly (if at all), and we introduce a novel encoding scheme, based on very limited and unsecured feedback -- the Block-Markov Wyner (BMW) encoding scheme -- which outperforms any schemes currently available.

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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