Geodesic
Criterion for the existence of a consistent protocol in a partial erasure channel
Čebyševskij sbornik, Tome 22 (2021) no. 1, pp. 133-151

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Covert channels allow one to transmit information using mechanisms that were not originally intended for transmission. An example is a process in which a transmitter encodes information in moves of a character of a multiplayer game, and a receiver observes the moves and decodes the original message. This channel may be noisy, since the character may fall out of the receiver's sight, a number of network packets may be lost, etc. Thus there emerges a natural problem of ogranizing a reliable channel. We propose a formal model called a partial erasure channel that describes the interaction of a transmitter and a receiver, introduce the notion of a consistent transmission protocol, formulate and prove the consistency criterion on the transmitting side and construct the optimal receiver for the given consistent transmitter.
Keywords: covert channels, partial erasure channels, information transmission protocol. 
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     author = {I. B. Kazakov},
     title = {Criterion for the existence of a consistent protocol in a partial erasure channel},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {133--151},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2021_22_1_a9/}
}
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I. B. Kazakov. Criterion for the existence of a consistent protocol in a partial erasure channel. Čebyševskij sbornik, Tome 22 (2021) no. 1, pp. 133-151. http://geodesic.mathdoc.fr/item/CHEB_2021_22_1_a9/