Securing Wireless Communications at the Physical Layer by Zang Li, Roy Yates, Wade Trappe (auth.), Ruoheng Liu, Wade

By Zang Li, Roy Yates, Wade Trappe (auth.), Ruoheng Liu, Wade Trappe (eds.)

Wireless platforms have gotten more and more pervasive and securing those structures has been not easy, largely as a result of the certain houses linked to instant communications. Securing those networks has typically been approached by way of taking a traditional strategy concerning cryptographic protocols. Such an procedure inherently seeks to safe the instant community on the hyperlink layer and above, and as a result fails to leverage the main specific attribute of instant verbal exchange: its actual layer.

Securing instant Communications on the actual Layer is a compilation of contributions by means of specialists in instant communications and safeguard, and offers cutting-edge effects that research the problem of introducing safeguard on the actual layer of a instant approach. all through this publication there's an underlying subject matter that the wealthy multipath atmosphere that's normal of instant situations helps the institution of latest safeguard prone on the actual layer, together with new mechanisms that determine cryptographic keys, that help conversation with guaranteed confidentiality, and that could authenticate transmitters in cellular environments. The booklet takes a holistic method of overlaying themes regarding actual layer safety ideas, with contributions starting from the theoretical underpinnings in the back of safe communications to sensible structures validations which were played on actual instant structures. The booklet additionally covers themes regarding making sure that cooperative instant communications on the actual layer is reliable. also, the rising quarter of modulation forensics, wherein a tool is ready to establish the modulation structure being hired by way of different units is explored.

Securing instant Communications on the actual Layer will function a priceless connection with engineers and researchers within the fields of safety and instant communications.

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Bell. Syst. Tech. , 28:657–715, 1949. [2] A. Wyner. The wire-tap channel. Bell. Syst. Tech. , 54(8):1355–1387, Jan. 1975. [3] I. Csisz´ar and J. K¨orner. Broadcast channels with confidental messages. IEEE Trans. Inf. Theory, 24(3):339–348, May 1978. [4] U. M. Maurer and S. Wolf. Information-theoretic key agreement: From weak to strong secrecy for free. Adv. Cryptol. EUROCRYPT, 351–368, 2000. [5] C. Bennett, G. Brassard, C. Crepeau, and U. M. Maurer. Generalized privacy amplification. IEEE Trans.

Note the differences between Eq. 16) and Eq. 9). In Eq. 16), the first term involves σu2 instead of P0 , since only part of the available transmit power is used to transmit the information bearing signal. The rest of the power is transmitted as artificial noise, which only affects the eavesdropper’s channel, as shown by the second term in Eq. 16). The secrecy capacity lower bound Csec obtained in Eq. 16) is a random variable because it depends on random channel gains Hk and Gk . In this scenario, the metrics of interest are the average of secrecy capacity and its outage probability.

In Fig. 3, we have superimposed the results obtained using artificial noise (NT = 5), with the results in Fig. 1. The figure shows that the outage curve for capacity has improved. 7 nats/symbol, now ∼ 5 nats/symbol can be guaranteed at an outage probability of 10−2 . However, the improvement in the outage curve for secrecy capacity is far more dramatic. In contrast to not being able to provide any rate guarantees at outage probability of even 10−1 (assuming SNRe ≥ 20 dB), we can now guarantee a secrecy rate of ∼ 3 nats/symbol at outage probability of 10−2 for the worst case scenario (SNRe → ∞).

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