Achieving Shannon Capacity Region as Secrecy Rate Region in a Multiple Access Wiretap Channel
This work addresses secure communication for multiple users in the presence of an eavesdropper, representing an incremental advance in information-theoretic security.
The paper tackled the problem of achieving secure communication in a multiple-access wiretap channel by using previously transmitted messages as keys, resulting in achieving the Shannon capacity region as the secrecy rate region.
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).