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Consider a collection of files, each of which is a sequence of letters. One of these files is randomly chosen and a random subsequence of the file is revealed. This random subsequence can be the result of a random sampling of the file. The goal is to recover the identity of the file, assuming a simple greedy matching algorithm to search the file collection. We study the fundamental limits on the maximum...
In this paper, the wiretap channel with side information studied in [2] is revisited for the case in which the side information is available only at the encoder and in a strictly causal manner. We derive a lower bound on the secrecy capacity of the channel based on a coding scheme which consists of block Markov encoding and key generation using the strictly causal state information available at the...
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