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- W2952466475 abstract "Unlike standard security methods (e.g. encryption), low probability of detection (LPD) communication does not merely protect the information contained in a transmission from unauthorized access, but prevents the detection of a transmission in the first place. In this work we study the impact of secretly pre-arranging the time of communication. We prove that if Alice has AWGN channels to Bob and the warden, and if she and Bob can choose a single $n$ symbol period slot out of $T(n)$ such slots, keeping the selection secret from the warden (and, thus, forcing him to monitor all $T(n)$ slots), then Alice can reliably transmit $mathcal{O}(min{sqrt{nlog T(n)},n})$ bits to Bob while keeping the warden's detector ineffective. The result indicates that only an additional $log T(n)$ secret bits need to be exchanged between Alice and Bob prior to communication to produce a multiplicative gain of $sqrt{log T(n)}$ in the amount of transmitted covert information." @default.
- W2952466475 created "2019-06-27" @default.
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- W2952466475 date "2014-03-05" @default.
- W2952466475 modified "2023-09-27" @default.
- W2952466475 title "LPD Communication when the Warden Does Not Know When" @default.
- W2952466475 hasPublicationYear "2014" @default.
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