scholarly journals A new wiretap channel model and its strong secrecy capacity

2016 ◽  
Author(s):  
Mohamed Nafea ◽  
Aylin Yener
Keyword(s):  
Channel Model ◽  
Secrecy Capacity ◽  
Wiretap Channel

scholarly journals E - Capacity - Equivocation Region of Wiretap Channel

2021 ◽  
Vol 27 (11) ◽  
pp. 1222-1239
Author(s):  
Mariam Haroutunian
Keyword(s):  
Secure Communication ◽  
Maximum Rate ◽  
Channel Model ◽  
Reliability Function ◽  
Achievable Rate ◽  
Secrecy Capacity ◽  
Wiretap Channel ◽  
Information Theoretic ◽  
Information Theoretic Security ◽  
The Given

One of the problems of information - theoretic security concerns secure communication over a wiretap channel. The aim in the general wiretap channel model is to maximize the rate of the reliable communication from the source to the legitimate receiver, while keeping the confidential information as secret as possible from the wiretapper (eavesdropper). We introduce and investigate the E - capacity - equivocation region and the E - secrecy capacity function for the wiretap channel, which are, correspondingly, the generalizations of the capacity - equivocation region and secrecy - capacity studied by Csiszár and Körner (1978). The E - capacity equivocation region is the closure of the set of all achievable rate - reliability and equivocation pairs, where the rate - reliability function represents the optimal dependence of rate on the error probability exponent (reliability). By analogy with the notion of E - capacity, we consider the E - secrecy capacity function that for the given E is the maximum rate at which the message can be transmitted being kept perfectly secret from the wiretapper.

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

2013 ◽  
Vol 2013 ◽  
pp. 1-19 ◽  
Author(s):  
Xinxing Yin ◽  
Xiao Chen ◽  
Zhi Xue
Keyword(s):  
Communication Systems ◽  
Limited Feedback ◽  
The State ◽  
Secrecy Capacity ◽  
Wiretap Channel ◽  
Action Sequence ◽  
State Sequence ◽  
Coding Schemes ◽  
Rate Splitting ◽  
Noiseless 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 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.

Sign in / Sign up

Export Citation Format

Share Document