Journal
IEEE COMMUNICATIONS MAGAZINE
Volume 53, Issue 12, Pages 40-+Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/MCOM.2015.7355564
Keywords
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Funding
- Natural Science Foundation of China [61201229, 61301102]
- Natural Science Foundation of Jiangsu Province [BK20130820]
- Zhejiang Science and Technology Department Public Project [2014C31051]
- Fundamental Research Funds for Central Universities [2014QNA5019]
- iTrust
- Taiwan Ministry of Science Technology [102-2221-E-006-008-MY3]
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With the growing popularity of mobile Internet, providing secure wireless services has become a critical issue. Physical layer security (PHY-security) has been recognized as an effective means to enhance wireless security by exploiting wireless medium characteristics, for example, fading, noise, and interference. A particularly interesting PHY-security technology is cooperative relay due to the fact that it helps to provide distributed diversity and shorten access distance. This article offers a tutorial on various multi-antenna relaying technologies to improve security at physical layer. The state-of-the-art research results on multi-antenna relay aided PHY-security as well as some secrecy performance optimization schemes are presented. In particular, we focus on large-scale MIMO relaying technology, which is effective in tackling various challenging issues for implementing wireless PHY-security, such as short-distance interception without eavesdropper CSI and with imperfect legitimate CSI. Moreover, the future directions are identified for further enhancement of secrecy performance.
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