Abstract
Secrecy capacity is analyzed in a Gaussian two-way relay wiretap channel (TRWC), where two legitimate source nodes wish to exchange their messages through a relay in the presence of an eavesdropper. We assume that all intended nodes operate in full-duplex mode and there is no direct path between two sources. In the Gaussian TRWC, we propose an achievable coding scheme composed of superposed lattice codes with both structured and random codebooks. A jamming strategy is further introduced at the two sources as well as at the relay to maximize the achievable secrecy rate regions, where each node allocates part of its power to jam the eavesdropper. Our result indicates that positive achievable secrecy rates are maintained even for the reversely degraded scenario. In addition, assuming two sources with equal power constraint, it is shown that the scheme asymptotically achieves within 1/2 bit from the cut-set bound based on the channel with no secrecy constraints, as the downlink phase is in the high signal-to-noise ratio regime.
| Original language | English |
|---|---|
| Title of host publication | Conference Record of the 45th Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2011 |
| Pages | 1987-1991 |
| Number of pages | 5 |
| DOIs | |
| Publication status | Published - 2011 Dec 1 |
| Event | 45th Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2011 - Pacific Grove, CA, United States Duration: 2011 Nov 6 → 2011 Nov 9 |
Publication series
| Name | Conference Record - Asilomar Conference on Signals, Systems and Computers |
|---|---|
| ISSN (Print) | 1058-6393 |
Other
| Other | 45th Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2011 |
|---|---|
| Country | United States |
| City | Pacific Grove, CA |
| Period | 11/11/6 → 11/11/9 |
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All Science Journal Classification (ASJC) codes
- Signal Processing
- Computer Networks and Communications
Cite this
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The Gaussian two-way relay channel with wiretapper. / Kim, Sungsoo; Shin, Won-Yong; Ishibashi, Koji.
Conference Record of the 45th Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2011. 2011. p. 1987-1991 6190373 (Conference Record - Asilomar Conference on Signals, Systems and Computers).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - The Gaussian two-way relay channel with wiretapper
AU - Kim, Sungsoo
AU - Shin, Won-Yong
AU - Ishibashi, Koji
PY - 2011/12/1
Y1 - 2011/12/1
N2 - Secrecy capacity is analyzed in a Gaussian two-way relay wiretap channel (TRWC), where two legitimate source nodes wish to exchange their messages through a relay in the presence of an eavesdropper. We assume that all intended nodes operate in full-duplex mode and there is no direct path between two sources. In the Gaussian TRWC, we propose an achievable coding scheme composed of superposed lattice codes with both structured and random codebooks. A jamming strategy is further introduced at the two sources as well as at the relay to maximize the achievable secrecy rate regions, where each node allocates part of its power to jam the eavesdropper. Our result indicates that positive achievable secrecy rates are maintained even for the reversely degraded scenario. In addition, assuming two sources with equal power constraint, it is shown that the scheme asymptotically achieves within 1/2 bit from the cut-set bound based on the channel with no secrecy constraints, as the downlink phase is in the high signal-to-noise ratio regime.
AB - Secrecy capacity is analyzed in a Gaussian two-way relay wiretap channel (TRWC), where two legitimate source nodes wish to exchange their messages through a relay in the presence of an eavesdropper. We assume that all intended nodes operate in full-duplex mode and there is no direct path between two sources. In the Gaussian TRWC, we propose an achievable coding scheme composed of superposed lattice codes with both structured and random codebooks. A jamming strategy is further introduced at the two sources as well as at the relay to maximize the achievable secrecy rate regions, where each node allocates part of its power to jam the eavesdropper. Our result indicates that positive achievable secrecy rates are maintained even for the reversely degraded scenario. In addition, assuming two sources with equal power constraint, it is shown that the scheme asymptotically achieves within 1/2 bit from the cut-set bound based on the channel with no secrecy constraints, as the downlink phase is in the high signal-to-noise ratio regime.
UR - http://www.scopus.com/inward/record.url?scp=84861321992&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84861321992&partnerID=8YFLogxK
U2 - 10.1109/ACSSC.2011.6190373
DO - 10.1109/ACSSC.2011.6190373
M3 - Conference contribution
SN - 9781467303231
T3 - Conference Record - Asilomar Conference on Signals, Systems and Computers
SP - 1987
EP - 1991
BT - Conference Record of the 45th Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2011
ER -