Security

Is Link Signature Dependable for Wireless Security?

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Executive Summary

Link signature, which refers to the unique and reciprocal wireless channel between a pair of transceivers, has gained significant attentions recently due to its effectiveness in signal authentication and shared secret construction for various wireless applications. A fundamental assumption of this technique is that the wireless signals received at two locations separated by more than half a wavelength are essentially uncorrelated. However, it has been shown in literatures that in certain circumstances, e.g., when there are poor scattering and/or a strong Line-Of-Sight (LOS) component, this assumption is invalid.

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