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Coordination in Cooperative Networks and Secret Key Agreement Using Common Information

Bereyhi, Ali | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44795 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Aref, Mohammad Reza
  7. Abstract:
  8. In order to utilize cooperative resources of a network, we have to investigate cooperative networks and strategies. Information theory, by introducing different concepts such as coordination and common information, gives us a suitable tool to study cooperative networks and using their resources. In this thesis, we investigate coordination and secret key agreement in cooperative networks. Our study consists of two parts. In the first part, we consider coordination and its applications in cooperative networks. For this purpose, we introduce the triangular multiterminal network as a proper model for studying empirical coordination in multiterminal networks and establish an inner and outer bounds on the empirical coordination capacity region of this networks. Furthermore, we utilize coordination model for analyzing the cooperative networks. We show that empirical coordination can be considered as a cooperative strategy in state-dependent multiple access channel with partially cooperating encoders. In addition, we establish strong coordination to analyze cooperation cost in the problem of source coding with helper. In the second part of this thesis we study the problem of secret key agreement in a state-dependent wiretap channel in which a transmitter and a legitimate receiver have access to two degraded versions of state causally. We utilize Gacs-Korner common information of the degraded versions of state to share a secret key between the legitimate users
  9. Keywords:
  10. Cooperative Network ; Empirical Coordination ; Strong Coordination ; State-Dependent Channel ; Secure Key Agreement ; Gacs-Korner Common Information

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