Entanglement is a well-known resource in quantum information. In particular, it can be exploited for quantum key distribution (QKD). In this paper, we define a two-way QKD scheme employing GHZ-type states of three qubits obtaining an extension of the standard E91 protocol with a significant increase in the number of shared bits. Eavesdropping attacks can be detected measuring violation of the CHSH inequality and the secret key rate can be estimated in a device-independent scenario.
Pastorello D. (2017). A quantum key distribution scheme based on tripartite entanglement and violation of CHSH inequality. INTERNATIONAL JOURNAL OF QUANTUM INFORMATION, 15(5), 1750040-1-1750040-15 [10.1142/S021974991750040X].
A quantum key distribution scheme based on tripartite entanglement and violation of CHSH inequality
Pastorello D.
2017
Abstract
Entanglement is a well-known resource in quantum information. In particular, it can be exploited for quantum key distribution (QKD). In this paper, we define a two-way QKD scheme employing GHZ-type states of three qubits obtaining an extension of the standard E91 protocol with a significant increase in the number of shared bits. Eavesdropping attacks can be detected measuring violation of the CHSH inequality and the secret key rate can be estimated in a device-independent scenario.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
