Patent ID: 8582770
Filing Date: 2013-11-12
Classification: H04B,H04L

Abstract:
1. A cryptographic communication system comprising: a transmitter including a first random number generator, an encoder for error-correcting coding, a second random number generator, a third random number generator, a first light source, a first modulator, equipment for privacy amplification, an encrypter and an optical transmitter having a second light source and a second modulator; a receiver including a first optical detector, a decoder for decoding an error-correcting code, equipment for privacy amplification, a second optical detector and a decrypter; and an optical transmission channel connecting the transmitter and the receiver to each other, wherein the transmitter and the receiver share a first seed key made of random numbers in advance, the first seed key provides a shared basis to the transmitter and the receiver, in the transmitter, in the receiver,