A wireless physically secure key distribution system
Geraldo A. Barbosa

TL;DR
This paper introduces a novel wireless key distribution protocol leveraging light's noise for security, extending optical noise-based security concepts to mobile wireless channels, and evaluates its security level.
Contribution
It develops a wireless secure key distribution scheme based on light's noise, removing the need for optical channels and enabling mobile device applications.
Findings
The protocol achieves a quantifiable security level against eavesdropping.
It demonstrates the feasibility of applying optical noise security principles to wireless channels.
The scheme is suitable for mobile device integration.
Abstract
A secure key distribution protocol protected by light's noise was introduced in 2003 [Phys. Rev. A 68, 052307 (2003)]. That protocol utilized the shot noise of light present in the optical channel (eg., an optical fiber) to restrict information leaks to an adversary. An initial shared information between the legitimate users allowed them to extract more information from the channel than the one obtained by the adversary. That original paper recognized the need for a privacy amplification step but no specific protocol was presented. More recently that original idea was improved with a specific privacy amplification protocol [arXiv:1406.1543v2 [cs.CR] 8 Jul 2015] while keeping the use of an optical communication channel. This work merges main ideas of the protection given by the light's noise in a protocol applied to wireless channels. The use of a wireless channels together with recorded…
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