Experimental composable key distribution using discrete-modulated continuous variable quantum cryptography.

ABSTRACT: Establishing secure data communication necessitates secure key exchange over a public channel. Quantum key distribution (QKD), which leverages the principles of quantum physics, can achieve this with information-theoretic security. The discrete modulated (DM) continuous variable (CV) QKD protocol, in particular, is a suitable candidate for large-scale deployment of quantum-safe communication due to its simplicity and compatibility with standard high-speed telecommunication technology. Here, we present the first experimental demonstration of a four-state DM CVQKD system, successfully generating composable finite-size keys, secure against collective attacks over a 20 km fiber channel with 2.3 × 10⁹ coherent quantum states, achieving a positive composable key rate of 11.04 × 10

SUBMITTER: Hajomer AAE 

PROVIDER: S-EPMC12304189 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature