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arXiv 1302.4767cs.ITcs.CRmath.IT
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基于OFDM的低功耗秘密密钥协商

Low-power Secret-key Agreement over OFDM

Francesco Renna, Nicola Laurenti, Stefano Tomasin, Marco Baldi, Nicola Maturo, Marco Bianchi, Franco Chiaraluce, Matthieu Bloch

摘要:

信息理论秘密密钥协议也许是迄今为止在物理层提供无条件安全的最实际可行的机制。在本文中,我们考虑的问题,秘密密钥协议,通过共享随机性在低功率的正交频分复用(OFDM)链路,在窃听者的存在。即使在衰落信道的情况下,低功率假设也大大简化了随机性共享方案的设计。我们评估所提出的系统的保密密钥速率方面的性能,并表明,一个实用的方法来共享密钥,通过使用低密度奇偶检验(LDPC)码的信息和解。数值结果证实了所提出的方法作为一个可行的和实用的解决方案的优点。此外,中断制定允许实现秘密密钥协议,即使只有统计知识的窃听信道是可用的。

英文摘要:

Information-theoretic secret-key agreement is perhaps the most practically feasible mechanism that provides unconditional security at the physical layer to date. In this paper, we consider the problem of secret-key agreement by sharing randomness at low power over an orthogonal frequency division multiplexing (OFDM) link, in the presence of an eavesdropper. The low power assumption greatly simplifies the design of the randomness sharing scheme, even in a fading channel scenario. We assess the performance of the proposed system in terms of secrecy key rate and show that a practical approach to key sharing is obtained by using low-density parity check (LDPC) codes for information reconciliation. Numerical results confirm the merits of the proposed approach as a feasible and practical solution. Moreover, the outage formulation allows to implement secret-key agreement even when only statistical knowledge of the eavesdropper channel is 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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