Secure Multiplex Coding Over Interference Channel with Confidential Messages
Xiaolin Li, Ryutaroh Matsumoto

TL;DR
This paper advances secure communication over interference channels by integrating multiplex coding with error correction, achieving the full Han-Kobayashi capacity region while ensuring strong security and improved equivocation bounds.
Contribution
It introduces a novel secure multiplex coding scheme that enhances capacity and security in interference channels, extending previous methods to achieve the entire Han-Kobayashi region with strong security guarantees.
Findings
Achieves the entire Han-Kobayashi region with security enhancements.
Removes rate loss caused by dummy messages for security.
Provides bounds on equivocation rate for finite and high-rate messages.
Abstract
In this paper, inner and outer bounds on the capacity region of two-user interference channels with two confidential messages have been proposed. By adding secure multiplex coding to the error correction method in [15] which achieves the best achievable capacity region for interference channel up to now, we have shown that the improved secure capacity region compared with [2] now is the whole Han-Kobayashi region. In addition, this construction not only removes the rate loss incurred by adding dummy messages to achieve security, but also change the original weak security condition in [2] to strong security. Then the equivocation rate for a collection of secret messages has also been evaluated, when the length of the message is finite or the information rate is high, our result provides a good approximation for bounding the worst case equivocation rate. Our results can be readily…
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Taxonomy
TopicsCooperative Communication and Network Coding · Wireless Communication Security Techniques · Coding theory and cryptography
