Wiretap Channel with Action-Dependent States and Rate-Limited Feedback

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...

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Bibliographic Details
Published in:Mathematical Problems in Engineering 2013-01, Vol.2013 (2013), p.445-463-043
Main Authors: Yin, Xinxing, Xue, Zhi, Chen, Xiao
Format: Article
Language:English
Subjects:
Channels
Codes
Coding
Communication systems
Computer simulation
Feedback
Information theory
Integrity
Mathematical models
Mathematical problems
Messages
Satellite communications
Sequences
Studies
Transmitters
Wireless networks
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Summary: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.
ISSN:1024-123X
1563-5147
DOI:10.1155/2013/131063