Cognitive Interference Channels with Confidential Messages under Randomness Constraint

TL;DR

This paper analyzes the capacity trade-offs in cognitive interference channels with confidential messages, focusing on the role of randomness in secure stochastic encoding and providing a complete characterization of the optimal trade-off.

Contribution

It introduces a comprehensive analysis of the trade-off between randomness rate and communication rates in secure cognitive interference channels, offering a complete characterization.

Findings

Optimal trade-off between randomness and communication rates is characterized.

Stochastic encoding is essential for security in cognitive interference channels.

Theoretical framework for secure communication with randomness constraints.

Abstract

The cognitive interference channel with confidential messages (CICC) proposed by Liang et. al. is investigated. When the security is considered in coding systems, it is well known that the sender needs to use a stochastic encoding to avoid the information about the transmitted confidential message to be leaked to an eavesdropper. For the CICC, the trade-off between the rate of the random number to realize the stochastic encoding and the communication rates is investigated, and the optimal trade-off is completely characterized.