Patent ID: 7492903
Filing Date: 2009-02-17
Classification: H04L

Abstract:
1. A secret key distribution method of distributing two random number tables correlated to each other serving as a secret key between sites A and B between which an N number of relay stations R(i) (i=1, 2, . . . , N) are located, the secret key distribution method comprising: generating an N+1 number of photon pairs PP(j) (j=1, 2, . . . , N+1) consisting of photons P sending a photon P determining a base for detecting a photon by exchanging information between A and R( causing R( causing R(m) to send to R(m+1) information C(m) as to whether to invert B(P causing R(N) to send to B information C(N) as to whether to invert B(P repeating procedures for acquiring bits correlated between A and B by the above operations as many times as necessary, and setting B(P