Patent ID: 9735955
Date: 2017-08-15
CPC Classifications: H04B,H04L

Claim:
1. A method, comprising: sharing a first initialization vector IV passing a first bit stream of first information from the first node to the second node as light transmitted over an optical fiber using a single-stage cryptography protocol, the first bit stream being polarization encoded by using a polarization modulator to apply a first polarization angle to a first set of bits within the first bit stream and a second polarization angle to a second set of bits within the first bit stream in accordance with the first initialization vector IV reading a subset of predetermined locations of bits within the first bit stream and generating a transformation vector based on the subset; generating a second initialization vector IV passing a second bit stream of second information from the second node to the first node using a single-stage cryptography protocol, the second bit stream being polarization encoded by applying a third polarization angle to a first set of bits within the second bit stream and a fourth polarization angle to a second set of bits within the second bit stream in accordance with the second initialization vector IV