SYSTEM AND METHOD FOR QUANTUM KEY DISTRIBUTION

摘要

A method and system for quantum key distribution (QKD) between a first location and a second location through an intermediate location. The system and method include executing a quantum phase between each of the first and second locations and the intermediate location to determine a first location raw data string at the first location, a first-intermediate raw data string at the intermediate location, a second location raw data string at the second location, and a second-intermediate raw data string at the intermediate location, respectively; calculating, at the intermediate location, announcement data based on a function of the first and second-intermediate raw data strings; announcing, at the intermediary location, the announcement data over a classical channel; and deriving, at each of the first and second locations, a secret key based on the available data and on communications between the first and second locations via a classical channel.

主权项

1. A method for quantum key distribution (QKD) between a first location (A) and a second location (B) through an intermediate location (T), the method comprising:
executing a quantum phase between the first location (A) and the intermediate location (T) to determine a first location raw data string (RA) at the first location and a first-intermediate raw data string (RAT) at the intermediate location (T); executing a quantum phase between the second location (B) and the intermediate location (T) to determine a second location raw data string (RB) at the second location (B) and a second-intermediate raw data string (RTB) at the intermediate location (T); calculating, at the intermediate location (T), announcement data based on a function (F) of the first-intermediate raw data string (RAT) and the second-intermediate raw data string (RTB); announcing, at the intermediary location (T), the announcement data over a classical channel; and deriving, at each of the first and second locations (A, B), a secret key (KAB) based on the first location raw data string (RA), the second location raw data string (RB), and the announcement data and on communications between the first and second locations (A, B) via the classical channel.