Hiding Information in Noise: Fundamental Limits of Covert Wireless Communication
Hiding Information in Noise: Fundamental Limits of Covert Wireless Communication
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DOI：
10.1109/mcom.2015.7355562
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发表时间：
2015-12-01
影响因子：
11.2
通讯作者：
Guha, Saikat
中科院分区：
文献类型：
--
作者：
Bash, Boulat A.;Goeckel, Dennis;Guha, Saikat
广泛部署的基于加密的安全可防止未经授权的解码，但不能确保通信不可检测。然而，从秘密军事行动和组织社会动乱到保护无线网络用户的隐私，隐蔽或低概率的检测/拦截通信在许多情况下都是至关重要的。此外，加密的数据或甚至只是信号的传输可能会引起怀疑，甚至理论上最健壮的加密也经常会被确定的对手使用非计算方法(如旁路分析)击败。已经开发了各种隐蔽通信技术来解决这些问题，包括用于有限字母表无噪声应用的隐写术和用于无线通信的扩频系统。在回顾了这些隐蔽通信系统之后，本文讨论了关于它们能力的基本限制的新结果，并对此类系统的未来进行了展望。
Widely deployed encryption-based security prevents unauthorized decoding, but does not ensure undetectability of communication. However, covert, or low probability of detection/intercept communication is crucial in many scenarios ranging from covert military operations and the organization of social unrest, to privacy protection for users of wireless networks. In addition, encrypted data or even just the transmission of a signal can arouse suspicion, and even the most theoretically robust encryption can often be defeated by a determined adversary using non-computational methods such as side-channel analysis. Various covert communication techniques have been developed to address these concerns, including steganography for finite-alphabet noiseless applications and spread-spectrum systems for wireless communications. After reviewing these covert communication systems, this article discusses new results on the fundamental limits of their capabilities, and provides a vision for the future of such systems as well.