English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A new class of quantum cryptography (QC) protocols that are robust againstthe most general photon number splitting attacks in a weak coherent pulseimplementation has been recently proposed. In this article we give a quiteexhaustive analysis of several eavesdropping attacks on these schemes. Theeavesdropper (Eve) is supposed to have unlimited technological power while thehonest parties (Alice and Bob) use present day technology, in particular anattenuated laser as an approximation of a single-photon source. They exploitthe nonorthogonality of quantum states for decreasing the informationaccessible to Eve in the multi-photon pulses accidentally produced by theimperfect source. An implementation of some of these protocols using presentday technology allow for a secure key distribution up to distances of $\sim$150 km. We also show that strong-pulse implementations, where a strong pulse isincluded as a reference, allow for key distribution robust against photonnumber splitting attacks.Comment: 16 pages, 11 figure

Coherent-pulse implementations of quantum cryptography protocols resistant to photon-number-splitting attacks