title: Secure key distribution using correlated randomness in lasers driven by common random light.
abstract: We propose a secure key distribution scheme based on correlated physical randomness in remote optical scramblers driven by common random light. The security of the scheme depends on the practical difficulty of completely observing random optical phenomena. We describe a particular realization using the synchronization of semiconductor lasers injected with common light of randomly varying phase. We experimentally demonstrate the feasibility of the scheme over a distance of 120 km.
authors.affiliation: NTT Communication Science Laboratories, NTT Corporation 2-4, Soraku-gun, Kyoto, Japan.
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Yoshimura
authors.forename: Jun
authors.initials: J
authors.lastname: Muramatsu
authors.forename: Peter
authors.initials: P
authors.lastname: Davis
authors.forename: Takahisa
authors.initials: T
authors.lastname: Harayama
authors.forename: Haruka
authors.initials: H
authors.lastname: Okumura
authors.forename: Shinichiro
authors.initials: S
authors.lastname: Morikatsu
authors.forename: Hiroki
authors.initials: H
authors.lastname: Aida
authors.forename: Atsushi
authors.initials: A
authors.lastname: Uchida