Wiretap channel with causal state information

A lower bound on the secrecy capacity of the wiretap channel with state information available causally at both the encoder and decoder is established. The lower bound is shown to be strictly larger than that for the noncausal case by Liu and Chen. Achievability is proved using block Markov coding, Shannon strategy, and key generation from common state information. The state sequence available at the end of each block is used to generate a key, which is used to enhance the transmission rate of the confidential message in the following block. An upper bound on the secrecy capacity when the state is available noncausally at the encoder and decoder is established and is shown to coincide with the lower bound for several classes of wiretap channels with state.

• Publication year

  2010

• Venue

  2010 IEEE International Symposium on Information Theory

• Publication date

  2010-01-13

• Fields of study

  Mathematics, Computer Science

• Identifiers
  DOI 10.1109/ISIT.2010.5513756arXiv 1001.2327
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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