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- W2775272426 abstract "Covert communication can prevent adversary from knowing that a wireless transmission has occurred. In additive white Gaussian noise channels, a square root law is obtained and result shows that Alice can reliably and covertly transmit $mathcal{O}(sqrt{n})$ bits to Bob in $n$ channel uses. If additional node near adversary can inject artificial noise to aid Alice in hiding her transmission attempt, covert throughput can be improved, i.e., Alice can covertly transmit $mathcal{O}(min{n,lambda^{alpha/2}sqrt{n}})$ bits to Bob over $n$ uses of channel ($lambda$ is density of friendly nodes and $alpha$ is path loss exponent of wireless channels). In this paper, we consider covert communication in a noisy wireless network, where Bob and adversary Willie not only experience background noise, but also aggregated interference from other transmitters. Our results show that uncertainty in interference experienced by Willie is beneficial to Alice. When distance between Alice and Willie $d_{a,w}=omega(n^{delta/4})$ ($delta=2/alpha$ is stability exponent), Alice can reliably and covertly transmit $mathcal{O}(log_2sqrt{n})$ bits to Bob in $n$ channel uses. Although covert throughput is lower than square root law and friendly jamming scheme, spatial throughput is higher. From network perspective, communications are hidden in the sound and fury of noisy wireless networks, and what Willie sees is merely a shadow wireless network. He knows for certain that some nodes are transmitting, but he cannot catch anyone red-handed." @default.
- W2775272426 created "2017-12-22" @default.
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- W2775272426 date "2017-12-14" @default.
- W2775272426 modified "2023-09-27" @default.
- W2775272426 title "The Sound and the Fury: Hiding Communications in Noisy Wireless Networks with Interference Uncertainty" @default.
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