Achieving Shannon Capacity Region as Secrecy Rate Region in a Multiple Access Wiretap Channel

TL;DR

This paper demonstrates how to achieve the Shannon capacity region in a multiple access wiretap channel by using previous messages as keys, enhancing secure communication.

Contribution

It introduces a method to attain the MAC capacity region under secrecy constraints by leveraging prior messages as cryptographic keys.

Findings

Achieves the Shannon capacity region with secrecy in a MAC setting.

Uses previous messages as keys to secure subsequent transmissions.

Provides a new approach to secure multi-user communication.

Abstract

We consider a two user multiple-access channel with an eavesdropper at the receiving end. We use previously transmitted messages as a key in the next slot till we achieve the capacity region of the usual Multiple Access Channel (MAC).