Wireless Physical Layer Integrated Security Design
Date Issued
2009
Date
2009
Author(s)
Cheng, Jen-Po
Abstract
Keeping information confidential is one of the important issues in wireless communications. Although it is getting widespread in our daily lives, the confidentiality is still protected by conventional encryption techniques. Recently, there have been many works about physical-layer (PHY) security techniques intending to exploit the unique characteristic of the wireless medium. However, the wireless medium is still the rich source that has not been well exploited. An integrated security design via lower layer techniques is proposed in this thesis. We develop a physical-layer network coding technique that well suits for confidential communications. By incorporating the special physical-layer network coding technique with a random receive beamforming algorithm and another two security mechanisms, the wireless transmissions with low probability-of-interception (LPI) can be guaranteed. One of the major differences between our approach and existing physical-layer security approaches is that our security design has nearly no limit of wireless environment. Thesers do not need to keep mobile. A typical BICM-OFDM structure is selected to be our basic system, and to show how to easily apply our security design techniques intosual communication systems. To verify the practicability of our security system, we use the IEEE 802.11n standard as the base of our physical-layer specification and the TGn channel models as our channel model. With these realistic settings, the LPI of our security system is verified by Monte Carlo methods. Since the effective attack by eavesdroppers has not been found, we provides arute-force attack and proves that it has a considerable complexity.
Subjects
Confidentiality
LPI
Physical-layer,OFDM
Physical-layer Network Coding
Sounding Protocol
Beamforming
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-98-R96942055-1.pdf
Size
23.32 KB
Format
Adobe PDF
Checksum
(MD5):3c22307a39766bc23d342f7aac835969