Wiretap Channel With Side Information
نویسندگان
چکیده
The wiretap channel put forward by Wyner for many years. In this paper, we consider the situation that the wiretapper can not only view the channel output via a second noisy channel, but also can get some side information about the codeword that transmitted in the main noisy channel. The designer tries to build the encoder-decoder in such a way as to maximize the transmission rate R, and the equivocation d of the information as seen by the wiretapper.We find the capacity region for (R,d) pairs, and in particular, if d is equal to Hs, the entropy of the data source, then we consider that the transmission is accomplished in perfect secrecy.Our result implies that there exists a C ′ s > 0, such that reliable transmission at rates up to C ′ s is possible in perfect secrecy. Index Terms — Wiretap channel, capacity region, perfect secrecy
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