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Mathematical Problems in EngineeringVolume 2013 2013, Article ID 131063, 19 pages

Research ArticleDepartment of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Received 5 September 2013; Revised 1 November 2013; Accepted 2 November 2013

Academic Editor: Hamid Reza Karimi

Copyright © 2013 Xinxing Yin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We introduce the wiretap channel with action-dependent states and rate-limited feedback. In the new model, the state sequence is dependent on the action sequence which is selected according to the message, and a secure rate-limited feedback link is shared between the transmitter and the receiver. We obtain the capacity-equivocation region and secrecy capacity of such a channel both for the case where the channel inputs depend noncausally on the state sequence and the case where they are restricted to causal dependence. We construct the capacity-achieving coding schemes utilizing Wyner-s random binning, Gel-fand and Pinsker’s coding technique, and rate splitting. Furthermore, we compare our results with the existing approaches without feedback, with noiseless feedback, and without action-dependent states. The simulation results show that the secrecy capacity of our model is bigger than that of the first two existed approaches. Besides, it is also shown that, by taking actions to affect the channel states, we guarantee the data integrity of the message transmitted in the two-stage communication systems although the tolerable overhead of transmission time is brought.





Autor: Xinxing Yin, Xiao Chen, and Zhi Xue

Fuente: https://www.hindawi.com/



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