Secret message capacity of erasure broadcast channels with feedback

We characterize the secret message capacity of a wiretapped erasure channel where causal channel state informa- tion of the honest nodes is publicly available. In doing so, we establish an intimate connection between message secrecy and secret key generation for the same channel setup. We propose a linear coding scheme that has polynomial encoding/decoding complexity, and prove a converse that shows the optimality of our scheme. Our work also demonstrates the value of causal public feedback, which has previously been shown for the secret key generation problem.


Published in:
2011 Ieee Information Theory Workshop (Itw), -
Presented at:
IEEE International Information Theory Workshop (ITW 2011), Parary, Brazil, October 16-20, 2011
Year:
2011
Publisher:
Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa
ISBN:
978-1-4577-0437-6
Keywords:
Laboratories:




 Record created 2012-01-25, last modified 2018-03-17

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