Patent ID: 8189785

Claim:
A method of generating substantially identical numerical sequences at stations A and B, comprising: a) first transmitting an incident first beam from station A to station B through a communication channel having a physical property capable of modifying the incident first beam in a non-deterministic manner and reflecting the incident first beam from station B back toward station A, forming a reflected first beam; b) at station A, comparing the incident first beam and reflected first beam to determine a first beam phase difference therebetween; c) at station A, quantizing the first beam phase difference into a number based on predetermined criteria; d) substantially simultaneously with the first transmitting, second transmitting an incident second beam from station B to station A through the physical communication channel and reflecting the incident second beam from station A back toward station B, forming a reflected second beam; e) at station B, comparing the incident second beam and reflected second beam to determine a second beam phase difference therebetween; f) at station B, quantizing the second beam phase difference into a number based on the predetermined criteria; and g) repeating steps a) through f) in order to generate a series of numbers at both station A and station B, which are substantially identical because the incident first and second beams are subject to identical changes by traveling substantially identical paths.