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Key agreement over multiple access channel using feedback channel

Salimi, S ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. DOI: 10.1109/ISIT.2011.6033897
  3. Publisher: 2011
  4. Abstract:
  5. In this paper, the effect of using an insecure and noiseless feedback channel in increasing secret key rates is investigated. There is a generalized discrete memoryless multiple access channel (GDMMAC) between two transmitters and a receiver where, in addition to the receiver, both of the transmitters receive noisy channel outputs. Furthermore, an insecure and noiseless feedback channel exists from the receiver to the transmitters. Each of the transmitters intends to share a secret key with the receiver while keeping it concealed from the other transmitter. For this setup, an inner bound of the secret key capacity region is derived. For some special cases, the secret key capacity region is obtained, and the effect of the feedback channel usage is discussed through a binary-erasure example as well as in the Gaussian case
  6. Keywords:
  7. Capacity regions ; Discrete memoryless multiple access channel ; Feedback channel ; Gaussians ; Information-theoretic security ; Key agreement ; Multiple access channels ; Noiseless feedback ; Noisy channel ; Secret key ; Secret key agreement ; Secret key capacity region ; Communication channels (information theory) ; Transmitters ; Feedback
  8. Source: IEEE International Symposium on Information Theory - Proceedings, 31 July 2011 through 5 August 2011 ; August , 2011 , Pages 1970-1974 ; 21578104 (ISSN) ; 9781457705953 (ISBN)
  9. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6033897