Work

Multichannel hybrid quantum cryptography for submarine optical communications

Year: 2026

Type: article

Abstract: We present a multichannel hybrid quantum cryptography approach intended for submarine quantum optical communications between Alice and Bob separated by a distance beyond the current QKD possibilities, each located on a coastline. It is based on the difficulty of simultaneous access to M optical submarine channels. The optical lines from the coastline, and ideally to the end of the continental shelf, are governed by the quantum properties of the light under an autocompensating high-dimensional discrete-modulation continuous variable QKD protocol. The hybrid approach consists of combining several secret keys of M channels and introducing extra layers of security, passive and/or active, on the non-quantum optical lines located beyond the continental shelf.

Source: Applied Optics

DOI: 10.1364/ao.574443

Authors: Jesús Liñares, Xesús Prieto-Blanco, Alexandre Vázquez-Martínez, Eduardo F. Mateo

Institution: NEC (Japan)

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funders: Ministerio de Ciencia, Innovación y Universidades, European Commission, Axencia Galega de Innovación, Agencia Estatal de Investigación

Awards: G4669519732, G529962013