In this letter, we study the opportunistic use of relays for secret communications, and propose two transmission schemes that do not require the knowledge of the eavesdropper's channel state information. Both analytic and numerical results are provided.
['Zhiguo Ding', 'Kin K. Leung', 'Dennis Goeckel', 'Donald F. Towsley']
Opportunistic Relaying for Secrecy Communications: Cooperative Jamming vs. Relay Chatting