DEVICE AND METHOD FOR PERFORMING INFORMATION RECONCILIATION IN A QUANTUM KEY DISTRIBUTION SYSTEM

摘要

The present invention provides a device for communicating with a remote device in a Continuous-Variable Quantum Key Distribution (CV-QKD) system to generate a secret key shared among the device and the remote device. The device is configured to refine a local sequence of symbols and cooperate with the remote device to generate the secret key based on the refined local sequence of symbols. Moreover, the device is configured to refine the local sequence, by performing the following operations; determining a local characteristic, the local characteristic being a characteristic of two or more symbols selected from the local sequence; initiating determining a measure of dissimilarity between the local characteristic and a remote characteristic; retaining at least one of the selected symbols in the local sequence when the measure of dissimilarity is below a predefined threshold, and dropping at least one of the selected symbols from the local sequence when the measure of dissimilarity is above the predefined threshold.