Date Added: Aug 2011
A common approach for introducing security at the physical layer is to rely on the channel variations of the wireless environment. This type of approach is not always suitable for wireless networks where the channel remains static for most of the network lifetime. For these scenarios, a channel independent physical layer security measure is more appropriate which will rely on a secret known to the sender and the receiver but not to the eavesdropper. In this paper, the authors propose CD-PHY, a physical layer security technique that exploits the constellation diversity of wireless networks which is independent of the channel variations.