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Inspired from quantum key distribution, we consider wireless communicationbetween Alice and Bob when the intermediate space between Alice and Bob iscontrolled by Eve. That is, our model divides the channel noise into two parts,the noise generated during the transmission and the noise generated in thedetector. Eve is allowed to control the former, but is not allowed to do thelatter. While the latter is assumed to be a Gaussian random variable, theformer is not assumed to be a Gaussian random variable. In this situation,using backward reconciliation and the random sampling, we propose a protocol togenerate secure keys between Alice and Bob under the assumption that Eve'sdetector has a Gaussian noise and Eve is out of Alice's neighborhood. In ourprotocol, the security criteria are quantitatively guaranteed even with finiteblock-length code based on the evaluation of error of the estimation ofchannel.

Quantum-inspired secure wireless communication protocol under spatial and local Gaussian noise assumptions