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首页> 外文期刊>Information Forensics and Security, IEEE Transactions on >Secrecy Capacities in Space-Division Multiplexed Fiber Optic Communication Systems
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Secrecy Capacities in Space-Division Multiplexed Fiber Optic Communication Systems

机译：空分复用光纤通信系统中的保密能力

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摘要

Space-division multiplexed (SDM) fiber optic transmission systems can not only increase system capacity, but also achieve physical-layer security against fiber tapping attacks. In this paper, we examine the information-theoretic security of optical multiple-input-multiple-output (MIMO) SDM by evaluating the tradeoff between the achievable information rate and the confidentiality for different channel dynamics. In particular, we provide problem formulations for secure communication over these channels and study three types of secrecy capacities: 1) guaranteed capacity; 2) outage capacity; and 3) average capacity, each serving as a performance metric for a coding strategy tailored to a specific type of MIMO-SDM channel. We also assess the impact of key system parameters, such as the number of modes, the mode-dependent loss (MDL), and the signal-to-noise ratio (SNR), on the various secrecy capacities. Our results indicate that, with a proper design of channel codes that balance information rate and security, an SDM system has the potential of offering confidential data transmission at a rate that could be orders of magnitude higher than what can be achieved through other means of encryption. Moreover, we show that MDL, unavoidably induced by fiber tapping, can allow information-theoretic security even if the SNR of the eavesdropper’s receiver is better than that of the legitimate receiver.
机译：空分复用（SDM）光纤传输系统不仅可以增加系统容量，而且还可以实现针对光纤窃听攻击的物理层安全性。在本文中，我们通过评估可实现的信息速率和不同信道动态性的机密性之间的折衷，研究了光多输入多输出（MIMO）SDM的信息理论安全性。特别是，我们为通过这些渠道进行安全通信提供了问题表述，并研究了三种保密能力：1）保证能力； 2）中断能力； 3）平均容量，每个容量均用作针对特定类型MIMO-SDM信道量身定制的编码策略的性能指标。我们还评估了关键系统参数（如模式数量，与模式有关的损耗（MDL）和信噪比（SNR））对各种保密能力的影响。我们的结果表明，通过适当设计能够平衡信息速率和安全性的信道代码，SDM系统具有以比通过其他加密方式所能达到的数量级更高的速率提供机密数据传输的潜力。 。此外，我们证明，即使窃听者的信噪比比合法接收者的信噪比高，不可避免地由光纤窃听引起的MDL也可以提供信息理论上的安全性。

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