Security proof of differential phase shift quantum key distribution in the noiseless case

Simple item page
dc.creatorZhao, Yi-Bo
dc.creatorFung, Chi-Hang Fred
dc.creatorHan, Zheng-Fu
dc.creatorGuo, Guang-Can
dc.date2008-06-12
dc.date2008-10-28
dc.date.accessioned2026-07-07T10:13:10Z
dc.date.available2026-07-07T10:13:10Z
dc.descriptionDifferential phase shift quantum key distribution systems have a high potential for achieving high speed key generation. However, its unconditional security proof is still missing, even though it has been proposed for many years. Here, we prove its security against collective attacks with a weak coherent light source in the noiseless case (i.e. no bit error). The only assumptions are that quantum theory is correct, the devices are perfect and trusted and the key size is infinite. Our proof works on threshold detectors. We compute the lower bound of the secret key generation rate using the information-theoretical security proof method. Our final result shows that the lower bound of the secret key generation rate per pulse is linearly proportional to the channel transmission probability if Bob's detection counts obey the binomial distribution.
dc.descriptionPublished version, 13 pages, 4 figures, minor changes, references added, acknowledgement added
dc.identifierhttps://arxiv.org/abs/0806.2000
dc.identifierhttp://arxiv.org/abs/0806.2000
dc.identifierPhys. Rev. A 78, 042330 (2008)
dc.identifierdoi:10.1103/PhysRevA.78.042330
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/172436
dc.subjectQuantum Physics
dc.titleSecurity proof of differential phase shift quantum key distribution in the noiseless case
dc.typetext

Files

Collections

arXiv