Wireless Physical-Layer Security Performance of UWB Systems

Traditionally, spread-spectrum systems have been employed to provide Low Probability-of-Intercept (LPI), Low Probability-of-Detection (LPD) performance at the physical layer, but the messages transmitted over such a system are still encrypted with a powerful cipher to protect their secrecy. However, it has recently been suggested that the cryptographic security of the system can be enhanced by exploiting physical properties of Ultra-WideBand (UWB) signals. With an eavesdropper observing the communications over multipath channels between two legitimate partners sharing a secret key of a limited length, the authors consider both coherent and reference-based UWB schemes to enhance security. The security of the legitimate nodes is achieved by signal attributes based on the secret key, giving them an advantage over the adversary.

Provided by: Institute of Electrical and Electronics Engineers Topic: Mobility Date Added: Oct 2010 Format: PDF

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