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- W2560318594 abstract "We consider the problem of generating correlated random variables in a distributed fashion, where communication is constrained to a cascade network. The first node in the cascade observes an i.i.d. sequence $X^{n}$ locally before initiating communication along the cascade. All nodes share bits of common randomness that are independent of $X^{n}$ . We consider secure synthesis—random variables produced by the system appear to be appropriately correlated and i.i.d. even to an eavesdropper who is cognizant of the communication transmissions. We characterize the optimal tradeoff between the amount of common randomness used and the required rates of communication. We find that not only does common randomness help, its usage exceeds the communication rate requirements. The most efficient scheme is based on a superposition codebook, with the first node selecting messages for all downstream nodes. We also provide a fleeting view of related problems, demonstrating how the optimal rate region may shrink or expand." @default.
- W2560318594 created "2016-12-16" @default.
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- W2560318594 date "2016-11-01" @default.
- W2560318594 modified "2023-10-16" @default.
- W2560318594 title "Secure Cascade Channel Synthesis" @default.
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- W2560318594 doi "https://doi.org/10.1109/tit.2016.2588499" @default.
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