Tight bounds for the eavesdropping collective attacks on general CV-QKD protocols that involve non-maximally entanglement

Becir, A. and Wahiddin, Mohamed Ridza (2012) Tight bounds for the eavesdropping collective attacks on general CV-QKD protocols that involve non-maximally entanglement. Quantum Information Processing, 12 (2). pp. 1551-1171. ISSN 1570-0755 (Print) 1573-1332 (Online)

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Abstract

A new method to quantify the eavesdropper’s accessible information on continuous variable quantum key distribution for protocols implementing homodyne and heterodyne detections is introduced.We have derived upper bounds for the eavesdropping collective attacks on general continuous variable quantum key distribution protocols. Our focus is especially on deriving bounds which are Gaussian optimal for Eve collective attacks that involve non maximally entanglement (i.e. Alice and Bob use non maximally entangled states or non-Gaussian modulation for their quantum key distribution protocols). The new bounds derived are tight for all continuous variable quantum key distribution protocols. We show that the eavesdropper’s accessible information is independent of the initial correlation between Alice and Bob modes in reverse reconciliation scheme, while in direct reconciliation scheme, Eve information is given as a function of Alice and Bob initial correlation.

Item Type:	Article (Journal)
Additional Information:	3760/28132
Uncontrolled Keywords:	continuous variable, quantum key distribution, Iwasawa decomposition, mutual information, Holevo bound
Subjects:	Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Information and Communication Technology > Department of Computer Science Kulliyyah of Information and Communication Technology > Department of Computer Science Kulliyyah of Science
Depositing User:	Professor Dr Mohamed Ridza Wahiddin
Date Deposited:	08 Jan 2013 08:10
Last Modified:	30 Jun 2020 15:44
URI:	http://irep.iium.edu.my/id/eprint/28132

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