title: Differential-phase-shift quantum secret sharing.
abstract: A quantum secret sharing (QSS) protocol based on a differential-phase-shift scheme is proposed, which quantum mechanically provides a full secret key to one party and partial keys to two other parties. A weak coherent pulse train is utilized instead of individual photons as in conventional schemes. Compared with previous QSS protocols, the present one features a simple setup, is suitable for fiber transmission, and offers the possibility for a high key creation rate. An experiment is also carried out to demonstrate the operation.
authors.affiliation: Osaka University, 2-1 Yamada-oka, Suita-shi, Osaka, 565-0871, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Inoue
authors.forename: T
authors.initials: T
authors.lastname: Ohashi
authors.forename: T
authors.initials: T
authors.lastname: Kukita
authors.forename: K
authors.initials: K
authors.lastname: Watanebe
authors.forename: S
authors.initials: S
authors.lastname: Hayashi
authors.forename: T
authors.initials: T
authors.lastname: Honjo
authors.forename: H
authors.initials: H
authors.lastname: Takesue