Diffie-Hellman key distribution in wireless multi-way relay networks

Diffie-Hellman protocol is a classical secret key exchange protocol for secure communications. This paper considers the extension of the original two-party Diffie-Hellman protocol to multi-party key distribution in wireless multi-way relay networks where multiple users can only communicate with one another through a single relay. Two efficient key exchange protocols are proposed. A performance comparison with existing methods adapted to the relay networks shows the enhanced efficiency and the originality of the proposed protocols designed specifically for the multi-way relay networks.