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CORR
2010
Springer

Secret-key Agreement with Channel State Information at the Transmitter

8 years 11 months ago
Secret-key Agreement with Channel State Information at the Transmitter
We study the capacity of secret-key agreement over a wiretap channel with state parameters. The transmitter communicates to the legitimate receiver and the eavesdropper over a discrete memoryless wiretap channel with a memoryless state sequence. The transmitter and the legitimate receiver generate a common key that must be concealed from the eavesdropper. We assume that the state sequence is known non-causally to the transmitter and no public discussion channel is available. We derive lower and upper bounds on the secret-key capacity. The lower bound involves constructing a common reconstruction sequence at the legitimate terminals and binning the set of reconstruction sequences to obtain the secret-key. For the special case of Gaussian channels with additive interference (secret-keys from dirty paper channel) our bounds differ by 0.5 bit/symbol and coincide in the high signal-to-noise-ratio and high interferenceto-noise-ratio regimes. For the case when the legitimate receiver is also ...
Ashish Khisti, Suhas N. Diggavi, Gregory W. Wornel
Added 22 Mar 2011
Updated 22 Mar 2011
Type Journal
Year 2010
Where CORR
Authors Ashish Khisti, Suhas N. Diggavi, Gregory W. Wornell
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