Quantum key distribution in real life

The quantum key distribution (QKD) technique establishes secret keys shared between two communicating parties. Theoretically, unconditional security provided by QKD is guaranteed by the fundamental laws of quantum physics. in the real life, it is still possible to obtain unconditionally secure QK...

Full description

Bibliographic Details
Main Authors:	Ali, Sellami, Ahmed, Abdallah Hassen, Habaebi, Mohamed Hadi, Chowdhury, Md. Sazzad Hossien
Format:	Article
Language:	English
Published:	IDOSI Publication 2012
Subjects:	T10.5 Communication of technical information TK5101 Telecommunication. Including telegraphy, radio, radar, television
Online Access:	http://irep.iium.edu.my/28060/ http://irep.iium.edu.my/28060/ http://irep.iium.edu.my/28060/1/5.pdf

id	iium-28060
recordtype	eprints
spelling	iium-280602013-04-25T06:47:03Z http://irep.iium.edu.my/28060/ Quantum key distribution in real life Ali, Sellami Ahmed, Abdallah Hassen Habaebi, Mohamed Hadi Chowdhury, Md. Sazzad Hossien T10.5 Communication of technical information TK5101 Telecommunication. Including telegraphy, radio, radar, television The quantum key distribution (QKD) technique establishes secret keys shared between two communicating parties. Theoretically, unconditional security provided by QKD is guaranteed by the fundamental laws of quantum physics. in the real life, it is still possible to obtain unconditionally secure QKD, even with (phase randomized) attenuated laser pulses, as theoretically demonstrated by Gottesman-Lo-L¨utkenhaus-Preskill (GLLP). However, one must pay a steep price by placing severe limits on the distance and the key generation rate. These problems were solved using the decoy state method introduced by Hwang. In this paper, we have proposed a method to estimate parameters of the decoy state method based on two decoy state protocol for both BB84 and SARG04. The vacuum and weak decoy state protocol has been introduced as a special case of two decoy states protocol. This method has given different lower bound of the fraction of single-photon counts (y1), the fraction of two-photon counts (y2), the upper bound QBER of single-photon pulses (e1), the upper bound QBER of two-photon pulses (e2) and the lower bound of key generation rate for both BB84 and SARG04. The fiber based QKD systems also have been simulated using the proposed method for BB84 and SARG04. The numerical simulation has shown that the fiber based QKD systems using the proposed method for BB84 are able to achieve both a higher secret key rate and greater secure distance than that of SARG04. Key words: Quantum cryptography % Quantum key distribution % Decoy state protocol and optical communications IDOSI Publication 2012-10 Article PeerReviewed application/pdf en http://irep.iium.edu.my/28060/1/5.pdf Ali, Sellami and Ahmed, Abdallah Hassen and Habaebi, Mohamed Hadi and Chowdhury, Md. Sazzad Hossien (2012) Quantum key distribution in real life. World Applied Sciences Journal , 4 (10). pp. 29-34. ISSN 1818-4952 10.5829/idosi.wasj.2012.20.mae.9999
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	T10.5 Communication of technical information TK5101 Telecommunication. Including telegraphy, radio, radar, television
spellingShingle	T10.5 Communication of technical information TK5101 Telecommunication. Including telegraphy, radio, radar, television Ali, Sellami Ahmed, Abdallah Hassen Habaebi, Mohamed Hadi Chowdhury, Md. Sazzad Hossien Quantum key distribution in real life
description	The quantum key distribution (QKD) technique establishes secret keys shared between two communicating parties. Theoretically, unconditional security provided by QKD is guaranteed by the fundamental laws of quantum physics. in the real life, it is still possible to obtain unconditionally secure QKD, even with (phase randomized) attenuated laser pulses, as theoretically demonstrated by Gottesman-Lo-L¨utkenhaus-Preskill (GLLP). However, one must pay a steep price by placing severe limits on the distance and the key generation rate. These problems were solved using the decoy state method introduced by Hwang. In this paper, we have proposed a method to estimate parameters of the decoy state method based on two decoy state protocol for both BB84 and SARG04. The vacuum and weak decoy state protocol has been introduced as a special case of two decoy states protocol. This method has given different lower bound of the fraction of single-photon counts (y1), the fraction of two-photon counts (y2), the upper bound QBER of single-photon pulses (e1), the upper bound QBER of two-photon pulses (e2) and the lower bound of key generation rate for both BB84 and SARG04. The fiber based QKD systems also have been simulated using the proposed method for BB84 and SARG04. The numerical simulation has shown that the fiber based QKD systems using the proposed method for BB84 are able to achieve both a higher secret key rate and greater secure distance than that of SARG04. Key words: Quantum cryptography % Quantum key distribution % Decoy state protocol and optical communications
format	Article
author	Ali, Sellami Ahmed, Abdallah Hassen Habaebi, Mohamed Hadi Chowdhury, Md. Sazzad Hossien
author_facet	Ali, Sellami Ahmed, Abdallah Hassen Habaebi, Mohamed Hadi Chowdhury, Md. Sazzad Hossien
author_sort	Ali, Sellami
title	Quantum key distribution in real life
title_short	Quantum key distribution in real life
title_full	Quantum key distribution in real life
title_fullStr	Quantum key distribution in real life
title_full_unstemmed	Quantum key distribution in real life
title_sort	quantum key distribution in real life
publisher	IDOSI Publication
publishDate	2012
url	http://irep.iium.edu.my/28060/ http://irep.iium.edu.my/28060/ http://irep.iium.edu.my/28060/1/5.pdf
first_indexed	2023-09-18T20:41:31Z
last_indexed	2023-09-18T20:41:31Z
_version_	1777409396924481536

Quantum key distribution in real life

Similar Items