Title :
Practical Quantum Cryptosystem for Metro Area Applications
Author :
Tajima, Akio ; Tanaka, Akihiro ; Maeda, Wakako ; Takahashi, Seigo ; Tomita, Akihisa
Author_Institution :
NEC Corp., Kawasaki
Abstract :
A practical quantum cryptosystem prototype has been developed for metro area applications. It is of the size of a desktop and incorporates a temperature-independent optical interferometer, a highly reliable photon detector module, and random number generators. It supports various functions, including bit/frame synchronization, BB84 bit reconciliation, error correction and privacy amplification for quantum key generation, and encrypted communication. Two weeks of testing using a commercial fiber in the field demonstrated its ability to continuously generate final keys and to perform crypto communication using the keys.
Keywords :
light interferometers; metropolitan area networks; optical fibre communication; quantum cryptography; random number generation; synchronisation; BB84 bit reconciliation; bit-frame synchronization; desktop size; encrypted communication; error correction; metro area networks; optical interferometer; photon detector module; privacy amplification; quantum cryptosystem; quantum key generation; random number generators; Cryptography; Error correction; Optical fiber communication; Optical fiber testing; Optical interferometry; Performance evaluation; Privacy; Prototypes; Random number generation; Stimulated emission; Single-photon detector (SPD); quantum cryptography (QC); quantum key distribution (QKD);
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2007.902841
