Open AccessInformation-theoretic secure key distribution based on common random-signal induced synchronization in unidirectionally-coupled cascades of semiconductor lasers
Author(s) -
Hayato Koizumi,
Shinichiro Morikatsu,
Hiroki Aida,
Takahiro Nozawa,
Izumi Kakesu,
Atsushi Uchida,
Kazuyuki Yoshimura,
Jun Muramatsu,
Peter Davis
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.017869
Subject(s) - synchronization (alternating current) , quantum key distribution , key (lock) , laser , computer science , semiconductor laser theory , signal (programming language) , random number generation , key generation , key distribution , optics , electronic engineering , cryptography , physics , telecommunications , algorithm , computer network , channel (broadcasting) , public key cryptography , encryption , computer security , engineering , photon , programming language
It has been proposed that a secure key distribution scheme using correlated random bit sequences can be implemented using common random-signal induced synchronization of semiconductor laser systems. In this scheme it is necessary to use laser systems consisting of multiple cascaded lasers to be secure against a powerful eavesdropper. In this paper, we report the results of an experimental study that demonstrate that the common random-signal induced synchronization is possible in cascaded semiconductor laser systems. We also show that the correlated random bit sequences generated in the synchronized cascaded laser systems can be used to create an information-theoretically secure key between two legitimate users.