Reconciliation of a Quantum-Distributed Gaussian Key

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  • 21 July 2001
Abstract
Two parties, Alice and Bob, wish to distill a binary secret key out of a list of Gaussian variables that were distributed with the help of quantum cryptography. We present a novel construction that allows the legitimate parties to get equal strings out of correlated variables, using a classical channel, with as few leaked information as possible. This opens the way to securely correcting non-binary key elements. In particular, the construction is refined to the case of Gaussian-distributed variables as it applies directly to a quantum cryptography protocol developed recently.

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